New Delhi: The Commission for Air Quality Management (CAQM) on Saturday invoked the strictest measures under its air pollution control plan, GRAP, including a ban on all construction and demolition activities in Delhi-NCR after pollution levels rose sharply amid unfavourable meteorological conditions.

The Sub-Committee on GRAP had earlier in the day decided to invoke Stage III of the Graded Response Action Plan (GRAP) across the entire NCR with immediate effect as air quality continued to worsen.

However, noting a further sharp rise in pollution levels since morning, the sub-committee held an urgent meeting at 6.30 pm to review the situation and weather forecasts by the IMD and IITM.

It observed that Delhi’s Air Quality Index (AQI), which stood at 401 at 10 am in the “severe” category,

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