Some three billion people — a third of the world's population — are exposed to “toxic amounts” of pollution produced when households burn plant material, animal dung and coal for cooking, lighting
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/smoky-fires-raise-risk-respiratory-diseases-early-death
[2] http://admin.indiaenvironmentportal.org.in/category/author/n-gopal-raj
[3] http://admin.indiaenvironmentportal.org.in/category/newspaper/hindu-new-delhi
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/indoor-air-pollution
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/respiratory-diseases
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/global
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/population
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/lung-disease
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution