A bench of Justices Abhay S Oka and Augustine George Masih said it is the constitutional duty of all states to ensure all citizens live in a pollution-free environment.

The Supreme Court censured the Commission for Air Quality Management for Delhi and adjoining areas for delaying the imposition of GRAP 3 and 4 curbs

SC seeks explanation from Delhi government on implementation of Graded Response Action Plan (GRAP) and says it is in favour of continuance of fourth stage of GRAP even in case of AQI level reduces below 400 level in Delhi Delhi Air Pollution Supreme Court Hearing Live Updates: We want to know what action government has taken, asks Justice Oka

NCR, the air quality deteriorated further on Monday morning with the AQI rising to ‘severe’ and ‘severe plus’ levels.

A bench of Justices Abhay S Oka and Augustine George Masih pointed out that there was a delay in implementation of preventive measures under stage 4 of the Graded Response Action Plan (GRAP) even after the Air Quality Index (AQI) touched alarming levels in the national capital.

Air quality in northern India has worsened over the past week, with New Delhi's AQI recording a reading of 465, classified as "severe plus category", on Sunday evening due to unfavourable meteorological conditions,

Due to Delhi's worsening air quality, reaching the 'Severe+' category, the CAQM has implemented Stage-IV GRAP measures. These include potential school closures for classes VI-XI, work-from-home for 50% of employees in various sectors,