He further said the National Green Tribunal (NGT) had in July 2017 in its voluminous 543-page report had laid out elaborate guidelines for curbing pollutants, including at Kanpur and suggested shifting of tanneries from river Ganga basins, regulating urban sewerage etc.
Indian cities that clocked high PM 2.5 pollutants are Delhi, Patna, Agra, Muzaffarpur, Srinagar, Gurgaon, Jaipur, Patiala and Jodhpur, followed by Ali Subah Al-Salem in Kuwait and some Chinese and Mongolian towns. Mumbai is the world’s 4th most polluted metropolis. The WHO study considered PM 2.5 (particulate matter of diameter less than 2.5 micrometres) and PM 10. PM 2.5 is more dangerous. The period considered for the WHO study was 2010 to 2016.