India tops global indoor air pollution chart with highest average annual PM2.5 levels followed by China and Turkey: Study
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India has topped a global indoor air pollution chart with the highest average annual PM2.5 levels followed by China, Turkey, UAE and South Korea, according to a study. Moreover, on the list of cities with highest average annual PM2.5 levels, national capital Delhi was on the top amongst the studied cities, followed by Beijing, Shanghai, Shenzhen and Busan, a Dyson statement said.