Toxic smog returns to Delhi after Diwali

Toxic smog returns to Delhi after Diwali  BBC News Firecrackers from Diwali celebrations shroud Delhi in toxic smog  The Guardian India's capital breathes toxic air as residents flout firecracker curbs  Reuters Air Pollution menace: Delhi-based start-up designs 40 feet tall purifier; read details  Financial Express Buying an Air Purifier For Your Home? Here is Everything You Need to Know  News18Full coverage