GRAP 4 enforced across Delhi-NCR as air quality worsens
Stage IV of GRAP, which is categorised as ‘Severe+’ air quality, is triggered when the Air Quality Index (AQI) in Delhi crosses the 450 mark.
Stage IV of GRAP, which is categorised as ‘Severe+’ air quality, is triggered when the Air Quality Index (AQI) in Delhi crosses the 450 mark.
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