BHOPAL: Gwalior in Madhya Pradesh and Chhattisgarh capital Raipur are among top four cities of the world with the dirtiest air, according to a World Health Organization (WHO) study.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/gwaliors-air-among-dirtiest-world
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/times-india-bhopal
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/madhya-pradesh
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/gwalior-t
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/who
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/raipur-t
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/chhattisgarh
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vehicular-pollution
[10] http://admin.indiaenvironmentportal.org.in/thesaurus/national-green-tribunal-ngt
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-quality-monitoring
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-quality-and-health