The national capital has been engulfed in a thick cover of pollutant-laden smog for the past few days, primarily after Diwali, forcing the residents to inhale 'severe' quality air.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/environment-ministry-issue-advisory-tackle-air-pollution
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/indian-express-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/diwali
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ministry-environment-and-forests-moef
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/festival
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vehicular-pollution
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/odd-even-numbered-cars
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution-control