Air quality in Kolkata deteriorates severely every winter and during the last one it was the worst among all the metro cities in the country. The city not only overshot the prescribed air quality index of 50 through an entire year (May to April 2018-19), during half the year from October to March, it went above 150 and touched a peak of over 300 in December-January.
This is the demon that the fledgling voluntary organisation, Kolkata Clean Air, has taken on. It was started two years ago and is headed by Ajay Mittal and Gargi Maitra. Mittal. . .