Delhi, air quality index

BS 3 petrol and BS 4 diesel cars were banned in Delhi after pollution levels breached severe category last week.
Delhiites could also expect smog or shallow to moderate fog in the morning and cloudy weather on Saurday, December 28.
The air quality index (AQI) in the national capital region deteriorated to 353 on Friday, from 345 a day earlier, remaining ...