Out of 36 monitoring stations, 35 stations remained in the 400+ AQI category. So, "What exactly is the Air Quality Index? How do we interpret it? Where does the data come from to calculate it?" ...

Delhi’s air remained dangerously polluted for more than half of the past five years, with residents breathing toxic air for 1,195 out of 2,137 days, ...

Twenty five cities have severe air quality days (over 400 AQI) for 1-17 days a year. (HT PHOTO) In a written response, minister of state Kirti Vardhan Singh said pollution is one of the factors ...