New Delhi is the most polluted city on Earth right now

Updated 0541 GMT (1341 HKT) November 8, 2016

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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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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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Photos: New Delhi chokes on smog

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.

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Photos: New Delhi chokes on smog

Young Indian runners take part in the New Delhi 10K Challenge amid heavy smog on November 6.

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Photos: New Delhi chokes on smog

Indian women walk as smog envelops the Jama Masjid Mosque in the old quarters of New Delhi on November 3.

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Photos: New Delhi chokes on smog

Indian commuters walk through the smog in the old quarters of New Delhi.

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Photos: New Delhi chokes on smog

An Indian cyclist rides along a street as smog envelops a monument in New Delhi on October 31, the day after the Diwali festival.

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Story highlights

Some parts of Delhi record air quality index of 999
City has instituted emergency measures to tackle smog

(CNN)Fresh air doesn't exist in New Delhi at the moment.

India's capital is choking under off-the-charts smog, with some parts of the city reporting levels almost five times those considered "unhealthy" by the US environmental protection agency.