A professor of environmental studies at Jamia Millia Islamia has claimed that the studies conducted on Delhiās air pollution are faulty as these were conducted against wrong parameters.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/studies-delhi-air-failed-due-use-wrong-parameters-says-jamia-prof
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/times-india-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/public-transport