{"id":243591,"date":"2021-07-15T00:00:00","date_gmt":"2021-07-14T23:00:00","guid":{"rendered":"https:\/\/ionscience.com\/news\/urban-air-quality-in-gas-detection\/"},"modified":"2021-07-15T00:00:00","modified_gmt":"2021-07-14T23:00:00","slug":"urban-air-quality-in-gas-detection","status":"publish","type":"post","link":"https:\/\/ionscience.com\/usa\/news\/urban-air-quality-in-gas-detection\/","title":{"rendered":"Urban Air Quality in Gas Detection"},"content":{"rendered":"<p><span style=\"font-weight: 400\">Our atmosphere is dynamic with biological, physical and chemical processes contributing to \u2018clean air\u2019, a gas mix that is well balanced for life and free of toxic gases and particulates. Oxygen is at as high a concentration as it enables aerobic organisms such as humans to breathe easily, while not too high resulting in unquenchable forest fires.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400\">Carbon dioxide is plentiful enough for plants to grow, both as a source of carbon and in retaining sufficient warmth from the sun. Elements essential for life such as sulfur and iodine are transported from land to sea in the form of volatile organic compounds (VOCs). VOCs are chemical compounds described as volatile because they evaporate easily, releasing molecules into the atmosphere.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400\">Many gases that are toxic or harmful to life are removed by chemical and physical adsorption on solid particles (particulates), which ultimately fall out of the air under gravity as dust or rain. Through a series of chemical reactions, including reactions with sunlight (photochemical reactions), the atmosphere is kept almost completely free of specific VOCs released by plants. For example, it has been recently established that when bruised, leaves release VOC messengers (pheromones) that attract predators of leaf-eating insects.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Gases and particles appearing from human activity face exactly the same processes as those realized naturally: either photochemically oxidized and\/or in forming and condensing on particulates which ultimately fall out as dust or rain. However, the volume of certain \u2018primary pollutants\u2019 discharged by human activity can be hazardous in itself, as well as in generating \u2018secondary pollutants\u2019 through various reactions. Also, high concentrations of VOCs released into the air may \u2018overwhelm\u2019 the very low concentrations of highly reactive atmospheric cleansing agents, such as OH and NO3, residing in the air unchanged for longer periods than they would be in cleaner air.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Primary pollutants, released directly into the atmosphere, include:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">NO and NO2 (\u2018NOx\u2019), chiefly from vehicle exhaust and coal-fired power stations<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">SO2 and SO3 (\u2018SOx\u2019) primarily from sulfurous coal-burning stoves and power stations<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">CO from vehicle exhaust, wood and coal burning<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">VOCs apart from methane from the following sources:<\/span>\n<ul>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Unburnt hydrocarbons from vehicles. This pollutant is eliminated where legislation ensures catalytic conversion of unburnt hydrocarbons.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Solvent release and spills. These may arise from poorly controlled industrial plant processes, fugitive emissions and spillages, but also a feature of urban pollution due to volatilization of solvents in domestic products such as cleaners and polishes.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Terpenes from forest fires.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Particles released directly into the atmosphere such as<\/span>\n<ul>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Metal oxide particles generated on vehicular breaking, coal burning, mineral processing.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Soot from diesel exhaust.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Tire wear.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Polyaromatic hydrocarbons (PAHs) ash and soot from forest fires, stubble burning and wood-burning stoves.<\/span><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><span style=\"font-weight: 400\">Secondary pollutants, resulting from the action of sunlight on NOx and VOCs, are:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Ozone, O3, which in the lower atmosphere is very harmful to all lifeforms<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Aldehydes such as formaldehyde, a harmful biocide<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Peroxyacyl nitrates (PANs)<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">A resultant photochemical or \u2018Los Angeles\u2019 smog comprising particulates often containing metal oxides, nitric acid, PAN, dissolved VOCs<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Sulfurous or \u2018London\u2019 smog, formed from sulfur coal burning, comprising water, ash, PAH\u2019s, sulfuric acid and nitric acid<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Acid rain is a secondary pollutant, formed by the reaction of rain droplets with NOx and SOx<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400\">ION Science is a leading gas detection and prevention company offering a variety of solutions across a vast amount of applications. To find out more about products offered by ION Science for gas and leak detection, view our<\/span> <a href=\"https:\/\/www.ionscience.com\/usa\/gas-and-leak-detectors\/\"><span style=\"font-weight: 400\">products page<\/span><\/a><span style=\"font-weight: 400\">. <\/span><span style=\"font-weight: 400\">For more information about air quality monitoring or if you have a question for us,<\/span> <a href=\"https:\/\/www.ionscience.com\/usa\/contact-us\/\"><span style=\"font-weight: 400\">contact ION Science <\/span><\/a><span style=\"font-weight: 400\">today.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.<\/p>\n","protected":false},"author":18,"featured_media":243592,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[819,725,696,1325,1224,1254,1225,821,730,1223],"tags":[1340,704,1363,1341,1364,1361,1342,1362],"class_list":{"0":"post-243591","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-gas-leak-detectors-us","8":"category-gases-us","9":"category-industry-application-us","10":"category-personal-detection","11":"category-pids","12":"category-portable-gas-detection","13":"category-sensors","14":"category-sensors-components-us","15":"category-uncategorised-us","16":"category-vocs","17":"tag-air-quality-monitoring","18":"tag-gas-detection-us","19":"tag-human-activity","20":"tag-monitoring-solutions","21":"tag-natural-elements","22":"tag-primary-pollutants","23":"tag-public-health","24":"tag-secondary-pollutants"},"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Urban Air Quality in Gas Detection - ION Science USA<\/title>\n<meta name=\"description\" content=\"Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be 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hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants 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through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/ionscience.com\/usa\/news\/urban-air-quality-in-gas-detection\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Urban Air Quality in Gas Detection - ION Science USA\" \/>\n<meta property=\"og:description\" content=\"Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/ionscience.com\/usa\/news\/urban-air-quality-in-gas-detection\/\" \/>\n<meta property=\"og:site_name\" content=\"Ion Science UK\" \/>\n<meta property=\"article:published_time\" content=\"2021-07-14T23:00:00+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/ionscience.com\/wp-content\/uploads\/2021\/08\/Urban-Air-ION-07152021.png\" \/>\n\t<meta property=\"og:image:width\" content=\"600\" \/>\n\t<meta property=\"og:image:height\" content=\"600\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"lpoorman\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"lpoorman\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/ionscience.com\/usa\/news\/urban-air-quality-in-gas-detection\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/ionscience.com\/usa\/news\/urban-air-quality-in-gas-detection\/\"},\"author\":{\"name\":\"lpoorman\",\"@id\":\"https:\/\/ionscience.com\/en\/#\/schema\/person\/c5dcb7b722e5e9b2e9ebfd9ea7332b2a\"},\"headline\":\"Urban Air Quality in Gas 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pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be 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by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/ionscience.com\/usa\/news\/urban-air-quality-in-gas-detection\/","og_locale":"en_US","og_type":"article","og_title":"Urban Air Quality in Gas Detection - ION Science USA","og_description":"Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.","og_url":"https:\/\/ionscience.com\/usa\/news\/urban-air-quality-in-gas-detection\/","og_site_name":"Ion Science UK","article_published_time":"2021-07-14T23:00:00+00:00","og_image":[{"width":600,"height":600,"url":"https:\/\/ionscience.com\/wp-content\/uploads\/2021\/08\/Urban-Air-ION-07152021.png","type":"image\/png"}],"author":"lpoorman","twitter_card":"summary_large_image","twitter_misc":{"Written by":"lpoorman","Est. reading time":"3 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/ionscience.com\/usa\/news\/urban-air-quality-in-gas-detection\/#article","isPartOf":{"@id":"https:\/\/ionscience.com\/usa\/news\/urban-air-quality-in-gas-detection\/"},"author":{"name":"lpoorman","@id":"https:\/\/ionscience.com\/en\/#\/schema\/person\/c5dcb7b722e5e9b2e9ebfd9ea7332b2a"},"headline":"Urban Air Quality in Gas 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USA","isPartOf":{"@id":"https:\/\/ionscience.com\/en\/#website"},"primaryImageOfPage":{"@id":"https:\/\/ionscience.com\/usa\/news\/urban-air-quality-in-gas-detection\/#primaryimage"},"image":{"@id":"https:\/\/ionscience.com\/usa\/news\/urban-air-quality-in-gas-detection\/#primaryimage"},"thumbnailUrl":"https:\/\/e7552ege7qf.exactdn.com\/wp-content\/uploads\/2021\/08\/Urban-Air-ION-07152021.png?strip=all","datePublished":"2021-07-14T23:00:00+00:00","author":{"@id":"https:\/\/ionscience.com\/en\/#\/schema\/person\/c5dcb7b722e5e9b2e9ebfd9ea7332b2a"},"description":"Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various reactions.|Primary pollutants created by human activity can be hazardous, as well as generating \u2018secondary pollutants\u2019 through various 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