Delhi’s air quality dips into 'very poor' category ahead of winter, AQI surpasses 300
Earlier, Delhi-NCR's Graded Response Action Plan (GRAP) was revised with new measures for stage III, triggered when AQI exceeds 200. Interstate buses on non-clean fuels and BS-III diesel vehicles are now banned. Actions in stages II to IV have been implemented on Sunday in advance based on AQI forecasts.