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The air quality in Delhi and National Capital Region (NCR) is one of the wrost in the world, as per a WHO survey of 1600 world cities. Two other cities in India that have worse air quality than Delhi includes - Gwalior in Madhya Pradesh, and Raipur in Chhattisgarh. Air pollution in India is the fifth largest killer and it is estimated to kill 1.5 million people every year. In Delhi, poor quality air damages irreversibly the lungs of 2.2 million or 50 percent of all children. In November 2016, in an event known as the Great smog of Delhi, the air pollution spiked far beyond acceptable levels. Levels of PM2.5 and PM 10 particulate matter hit 999 micrograms per cubic meter, while the safe limits for those pollutants are 60 and 100 respectively.
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LAST UPDATED : Dec 16, 2018, 11:19 PM IST

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