How long will India's national capital breathe toxic air?

This day last year, Delhi was battling with smog, the deadly concoction of smoke and fog, a few days after Diwali and Chief Minister Arvind Kejriwal said that the national capital has turned into a "gas chamber".

The Delhi Chief Minister had then said that prima facie the "biggest reason seems to be burning of stubble in agricultural fields in Haryana and Punjab in huge quantity". An year later, the situation has not changed a bit.

As visibility dropped to 50 metres today morning due to a thick blanket of smog and the air quality across Delhi was "hazardous", Chief Minister Arvind Kejriwal said that Delhi has "become a gas chamber".