Pollution in Delhi increases, air quality 'severe' at several places
The safe range for PM2.5 is 60 microgrammes per cubic meter as per Indian standards and 25 units as per International norms.
Nov 06, 2017, 17:27 PM IST
The safe range for PM2.5 is 60 microgrammes per cubic meter as per Indian standards and 25 units as per International norms.
Nov 06, 2017, 17:27 PM IST