Some towns in the national capital region have recorded 'very poor' air quality over the past 1 week, the Central Pollution Control Board data shows. With 'very poor' air quality predicted in Delhi-NCR by Saturday, ahead of Diwali, the Commission for Air Quality Management directed authorities to enact stage two of GRAP, which includes banning the use of coal and firewood in hotels, restaurants and open eateries. NDTV's Parmeshwar Bawa reports.