Five million pollution masks to be handed to Delhi residents

Air pollution in capital territory 20 times higher than WHO recommended safe level

The residents of Delhi have already begun to forget what it is like to wake up and see the sky.

Almost a week on from Diwali, the thick brown smog that shrouded the city after the festival has showed no sign of shifting. On Friday, as the air became poison and 20 million people struggled to breathe, a public health emergency was declared, with Delhi's chief minister Arvind Kejriwal declaring the city had turned into a "gas chamber".