Delhi's air quality back in 'very poor' zone, days after Diwali may be worse

The daily air quality index (AQI) in Delhi – calculated as a 24-hour average till 4pm – was at 311 on Thursday, a level last seen on October 16 before a pick-up in wind speeds helped keep air pollution down.

from Hindustan Times - topnews https://ift.tt/2W9ydzM