Links:
[1] http://admin.indiaenvironmentportal.org.in/news/foul-air-chokes-dhanbad-iit-study-says-coal-capital-most-polluted-industry-hub
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/telegraph-ranchi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/industrial-pollution
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/central-pollution-control-board-cpcb
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/urban-air-quality
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/small-scale-industry
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/indian-institute-technology-iit
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/dhanbad-d
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/jharkhand