Various ministries are playing a role in tacking this problem and this makes it very difficult
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/air-quality-index-not-akin-air-quality-control-say-experts
[2] http://admin.indiaenvironmentportal.org.in/category/author/aniruddha-ghosal
[3] http://admin.indiaenvironmentportal.org.in/category/newspaper/indian-express-new-delhi
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vehicular-pollution
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-quality-index-aqi
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/central-pollution-control-board-cpcb
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/diesel
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ministry-environment-and-forests-moef
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects