Delhi world’s most polluted capital; ranks fourth among cities, Ghaziabad 2nd
Delhi emerged as the most polluted capital and the fourth most polluted city in the world, according to a 2021 World Air Quality Report by Swiss organisation IQAir. The report said Delhi saw a 14.6% increase in PM2.5 concentration in 2021, with levels rising to 96.4 ug/m3 (micrograms per cubic metres) from 84 ug/m3 in 2020. This…
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