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Schools shut as toxic smog hits Delhi

Delhi shut all primary schools on Wednesday as pollution hit 70 times the World Health Organisation’s safe level, prompting doctors in the Indian capital to warn of a public health emergency.

Dense grey smog shrouded the roads of the world’s most polluted capital, where many pedestrians and bikers wore masks or covered their mouths with handkerchiefs and scarves.

The US embassy website showed the concentration of PM 2.5 — the microscopic particles that are the most damaging to health — topped 700 early on Wednesday morning, 70 times the WHO guidelines on long-term exposure, before dropping slightly.

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