Air pollution is the world's "largest single environmental risk", according to the World Health Assembly, which closed last week in Geneva.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/who-air-pollution-worlds-largest-single-environmental-risk
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/huffington-post-0
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environment
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/who
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/indoor-air-pollution
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/chulhas-cookstoves
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/heart-diseases