28 Most Polluted Cities in the World

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3. Pasakha, Bhutan
> Population: 20,000
> Average annual PM2.5 pollution per cubic meter: 149.9 micrograms
> Average annual PM10 pollution per cubic meter: 275.0 micrograms

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2. Faridabad, North India
> Population: 1.8 million
> Average annual PM2.5 pollution per cubic meter: 171.5 micrograms
> Average annual PM10 pollution per cubic meter: 315.9 micrograms

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1. Kanpur, North India
> Population: 3.0 million
> Average annual PM2.5 pollution per cubic meter: 173.0 micrograms
> Average annual PM10 pollution per cubic meter: 318.5 micrograms