Delhi air quality 'poor'; CAQM activates Stage I of GRAP as winter pollution returns

India's Commission for Air Quality Management has activated Stage I of the Graded Response Action Plan as Delhi's air quality enters the 'poor' category, marking the start of the annual winter pollution season. The explainer assesses GRAP's historical effectiveness, which remains contested as the plan's staged measures have not consistently prevented severe episodes. This signals the beginning of a recurring public-health and policy challenge in the national capital region.

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