PATNA: Believe it or not, but Patna is the sixth most polluted city in the world.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/%E2%80%98patna-sixth-most-polluted-city-world%E2%80%99
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/times-india-patna-0
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/bihar
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/patna-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/industrial-pollution
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vehicular-pollution