'Kolkata air healthy for very short time in a year'
According to Rajeev Sharma, Resource Conservation Specialist, Embassy of the US, New Delhi, there is a very short window when the air quality in Kolkata is at its best.
Sep 16, 2016, 09:19 AM ISTKolkata air toxic, warns study
CSE has analysed the data from the official ambient monitoring reported by the Central Pollution Control Board and West Bengal State Pollution Control Board.
Jan 30, 2016, 22:42 PM IST