NEW DELHI, INDIA - NOVEMBER 28 : Smog and pollution are seen around the tomb of the Mughal Emperor Humayun on November 28, 2021 in New Delhi, India. The air quality in the national capital plunged to the severe category leaving Delhiites gasping for fresh air The System of Air Quality and Weather Forecasting And Research SAFAR, informed that the air quality index in the city is at 403 thereby being in the severe category Imtiyaz Khan / Anadolu Agency/ABACAPRESS.COM