10 Countries With the Worst Air Pollution

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2. Pakistan

Annual Average PM2.5 Concentration (2023): 73.7 μg/m³

Pakistan is one of the countries with the worst air pollution. It has a particulate matter concentration of 73.7 μg/m³, as of 2023. Its PM2.5 concentration is 14.7 times higher than the WHO guidelines. It is ranked 2nd on our list.

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