Government declares Delhi, Faridabad among top five Indian cities with worst air pollution
There are six AQI categories - good, satisfactory, moderately polluted, poor, very poor and severe.
Mar 27, 2017, 21:50 PM IST
There are six AQI categories - good, satisfactory, moderately polluted, poor, very poor and severe.
Mar 27, 2017, 21:50 PM IST