New Delhi is the most polluted city on Earth right now

By James Griffiths, CNN

Updated 0541 GMT (1341 HKT) November 8, 2016

A Delhi policeman stands guard at the war memorial India Gate engulfed in a thick smog in New Delhi, India, on November 6, 2016.
Photos: New Delhi chokes on smog
A Delhi policeman stands guard at the war memorial India Gate engulfed in a thick smog in New Delhi, India, on November 6, 2016.
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Protesters wearing protective masks take part in a rally urging immediate action to curb air pollution in New Delhi on November 6, 2016.
Photos: New Delhi chokes on smog
Protesters wearing protective masks take part in a rally urging immediate action to curb air pollution in New Delhi on November 6, 2016.
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Schools in the Indian capital have been closed for the three days as the city struggles with one of the worst spells of air pollution in recent years.