Delhi, the most polluted city

A pair of artificial lungs put up in New Delhi to demonstrate the lethal effects of smog in the Indian capital have turned a sickly dark brown within 10 days of their installation, underscoring the city’s pollution crisis.

Delhi, the world’s most polluted major city, has been covered in a toxic grey haze since the onset of winter last month, with pollution levels several times higher than the World Health Organisation’s safe limits. –