New Delhi, Dec. 14 -- As Delhi battles toxic fumes, with the air quality slipping into the 'severe' category with a reading of 459 on Sunday, yoga guru Ramdev said poor AQI is only an indicator of a progressing country.

Speaking at a TV channel's special show, the yoga guru acknowledged that Delhi can sometimes become like a "gas chamber," but shrugged it off, saying, "When a country is progressing, naturally some dust will fly."

He suggested that people should put up curtains in their homes to save themselves from the deteriorating air pollution.

".dust them (curtains) off a little after 15-20 days while wearing a mask," he added.

A thick layer of smog blanketed the capital city overnight, leaving people gasping for air. Most Delhi r...