New Delhi, Nov. 14 -- Delhi woke up on Friday to a thick layer of toxic smog, as the air quality in the national capital showed no improvement, with the Air Quality Index (AQI) standing at 397, categorised as 'very poor' at 8 am on Friday. The AQI at 7 am was 399, only a point less than touching the 'severe' category mark.

Yesterday, the AQI recorded in the national capital at 4 pm was 404, categorised as 'severe' air quality.

According to the data of the Central Pollution Control Borad (CPCB), several monitoring stations in the national capital recorded an AQI above than the mark of 400 on Friday.

Ashok Vihar recorded an AQI of 419, Bawana 440, Burari Crossing 412, CRRI Mathura Road 403, Chandani Chowk 442, Dwarka Sector-8 413, ITO 42...