Delhi air quality slips to 'Severe' category again

Whatever the causes of the smog, by one ranking Delhi was not just the most polluted city in the world, but “nearly five ...
The Supreme Court on Friday said it would consider on November 25 whether or not to ease the anti-pollution GRAP-4 restrictions in Delhi-NCR keeping in view the drop in air quality index levels.
The average air quality index in Delhi increased to 494 on Tuesday, well beyond the “severe plus” category for air pollution ...