Since the US Clean Air Act’s passage in the 1970s, there have been a steady stream of reports correlating exposure to air pollutants with a variety of health impacts.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/new-studies-link-pollution-variety-health-risks
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/guardian-uk
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/firewood
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ozone
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/nitrogen-dioxide
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/coal
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/hazardous-waste
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/forest-fires