Cold Conditions Tighten Grip Over Delhi, AQI Slips to Severe Category

The Air Quality Index (AQI) in the national capital slipped to the ‘severe’ category with a reading of 405 at 8 pm, according to the Central Pollution Control Board (CPCB)The Air Quality Index (AQI) in the national capital slipped to the ‘severe’ category with a reading of 405 at 8 pm, according to the Central Pollution Control Board (CPCB)