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5 million children to get face masks as New Delhi battles heavy pollution

New Delhi (CNN)Five million New Delhi children will be given face masks by the government as the city battles heavy smog so toxic that it threatens to force schools to shut.India's capital -- which has been ranked the most polluted city in the world -- experienced hazardous levels of pollution on Friday afternoon, shooting up to as high as 743 particles of PM2.5 per cubic meter on the air quality index in some areas. Any level above 100 is considered unhealthy.If air pollution stays at this level for more than 48 hours, authorities will implement emergency measures for the first time this year, a Central Pollution Control Board official told CNN. Those measures include shutting schools, stopping construction work, banning trucks from enteri ...