"air-quality"

The Ministry of Earth Sciences' air quality monitor, SAFAR, stated the share of stubble burning in Delhi's PM2.5 pollution stood at 15 per cent on Wednesday.

On Sunday, a central government agency reported 1,230 farm fires in Delhi's neighbouring states -- the maximum in a day so far this season.

Doctors warn that even those who have had COVID-19 in the past are not out of the woods.

The city recorded an air quality index (AQI) of 315 at 11:10 am. The last time the air quality hit such a poor level was in February.

Kejriwal said that if the Delhi government can make efforts to prevent stubble burning, so can other state governments.

An AQI between 0 and 50 is considered 'good', 51 and 100 'satisfactory', 101 and 200 'moderate', 201 and 300 'poor', 301 and 400 'very poor', and 401 and 500 'severe'.