After brief escape, Delhi AQI back to 'severe' for 4th day

Delhi’s 24-hour average air quality index (AQI) as recorded by the Central Pollution Control Board (CPCB) at 4pm on Saturday, was 399 in the “very poor” category. At 10.30pm though, this was 411.

from Hindustan Times - topnews https://ift.tt/36qB2Bj