Delhi has been covered under a thick blanket of smog for days (File)
The Centre today implemented stage-IV measures of the Graded Response Action Plan (GRAP) - the highest level of alert - with immediate effect in smog-ridden Delhi and its neighbouring cities, which remained in the 'severe plus' category for the fourth consecutive day.
The national capital has been covered under a thick blanket of smog for days, with no signs of improvement in the capital's choking levels of pollution.
Here's what is allowed and what isn't under the Stage-IV of GRAP: