This level of pollution is a major cause of concern for the residents, especially those already suffering from respiratory problems.

Around 38% of the pollution in New Delhi this year has been caused by stubble burning - a practice where stubble left after harvesting rice is burnt to clear fields - in the neighbouring states of Punjab and Haryana, according to SAFAR, a weather forecasting agency under the ministry of earth sciences.

As per Prana Air, Air Quality Index (AQI) of the national capital has reached 580 and has been termed as hazardous.