The air quality of national capital is continuously deteriorating with rise of pollutants in the atmosphere. Air Quality Index (AQI) is at 404 in Patparganj, in 'severe' category as per Central Pollution Control Board (CPCB) data. AQI is at 408 in Anand Vihar, 447 in Bawana, 404 in Patparganj and 411 in Wazirpur; all four in 'severe' category, as per CPCB data. The AQI is again in 'severe' category at several locations in the national capital on October 30. Thick layer of smog enveloped in Delhi related to which residents raised their concerns. Delhi Government has launched campaigns like-'Yudh Pradushan ke Virudh' and 'Red Light On, Gaadi Off' to combat the problems of air pollution.