As Delhi air pollution continues to choke residents of the national capital, the Commission for Air Quality Management (CAQM) has tightened the Graded Response Action Plan (GRAP) measures.

The CAQM's decision comes days after the Supreme Court allowed major revisions under GRAP, with the commission saying that some GRAP Stage 4 measures will be enforced under GRAP Stage 3 .

The changes, which were finalised on November 21, brings stricter measures to earlier stages of the short-term plan. Also Read | GRAP rejig: Stage IV curbs to apply at Stage III amid poor air quality in Delhi

This means that some rules under GRAP Stage 4, which is enacted when AQI is above 450, will now be implemented when GRAP Stage 3 is enforced. The GRAP Stage 3 is implemented when the AQI remains between 4

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