Noting that air pollution persists in the national capital despite several remedial steps having been taken by the Commission for Air Quality Management (CAQM), the Supreme Court on Tuesday directed Delhi, Punjab, Haryana, Uttar Pradesh and Rajasthan governments to file affidavits enumerating measures initiated by them to control it.

Observing that until a couple of decades ago this was the best time in Delhi, the court said the city is now marred by worsening air quality and it is difficult to even step outside the house.