New Delhi [India], October 20 (ANI): A layer of fog engulfs parts of the national capital as air pollution has been on constant rise. The AQI at Anand Vihar area of Delhi has dropped to 454 recorded at 8:30 am, putting it under the ‘Severe’ category. The AQI at Dwarka, sector-8, has fallen to 311 at 8:30 am, marked under the ‘Very Poor’ category. The AQI at ITO in the national capital stood at 232 at 8:30 am, marked under the ‘Poor’ category. Jahangirpuri has recorded AQI at the mark of 350 at 8:30 am, putting it under the ‘Very Poor’ category. The AQI has been recorded at 254 at Nehru Park an…