Chennai had the highest proportion of ‘severe’ days based on AQI
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/quality-air-you-breathe-chennai-worse-delhi
[2] http://admin.indiaenvironmentportal.org.in/category/author/rukmini-s
[3] http://admin.indiaenvironmentportal.org.in/category/newspaper/hindu-new-delhi
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/tamil-nadu
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/chennai-t
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-quality-standards
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-quality-index-aqi
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/centre-science-and-environment-cse