The Grap 4 measures mandates states to consider emergency measures like closure of colleges, educational institutions and other non‑emergency activities.

The Commission for Air Quality Management (CAQM) on Saturday imposed GRAP Stage IV restrictions in Delhi-NCR hours after strict curbs were imposed under GRAP III. The tightening of norms by the pollution agency comes as the air quality in the national capital breached 400-mark.

According to Central Pollution Control Board, the Air Quality Index as of 4 pm on December 13 was at 431 in the severe category.

The CAQM said that the Sub-Committee on GRAP has decided to invoke all actions under Stage-IV of GRAP, in addition to the restrictions under GRAP III. With stricter norms in place, the capital is set to witness restrictions on scho

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