India, Dec. 1 -- A PIL filed in the Delhi High Court has sought urgent steps to control hazardous air pollution levels in the national capital.

The plea said over the past several years, the ambient air quality in Delhi has deteriorated drastically, with AQI frequently entering the 'very poor', 'severe' and 'hazardous' categories, especially during winter.

The increased pollution has resulted in persistent and serious health issues among residents, including children, senior citizens and persons with pre-existing ailments, it said.

The petition has been filed by Greater Kailash-II Welfare Association, which has urged the court to order urgent, effective and scientific measures, both immediate and long-term, to control the city air poll...