Delhi Pollution: Breathing air in national capital akin to smoking 20 cigarettes a day? This report says so

Pollution levels in the national capital deteriorated to such an extent on Friday that breathing in the region became akin to smoking 20 cigarettes, a report said. According to Berkeley Earth's report, one cigarette in a day is equivalent to air pollution of 21.6 microgram per cubic meter. On conducting a study in the year 2015, two professors found that when PM 2.5 level stood at 21.6 microgram per cubic meter, it equaled to one cigarette. 

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