The 30 Most Polluted Places on Earth

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10. Gurgaon, North India
> Population: 902,000
> Average annual PM2.5 pollution per cubic meter: 119.6 micrograms
> Average annual PM10 pollution per cubic meter: 124.3 microgram

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9. Agra, North India
> Population: 2.0 million
> Average annual PM2.5 pollution per cubic meter: 131.4 micrograms
> Average annual PM10 pollution per cubic meter: 194.5 micrograms

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8. Bamenda, Cameroon
> Population: 349,000
> Average annual PM2.5 pollution per cubic meter: 132.0 micrograms
> Average annual PM10 pollution per cubic meter: 141.0 micrograms

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7. Lucknow, North India
> Population: 3.2 million
> Average annual PM2.5 pollution per cubic meter: 138.4 micrograms
> Average annual PM10 pollution per cubic meter: 254.9 micrograms

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6. Delhi, North India
> Population: 25.7 million
> Average annual PM2.5 pollution per cubic meter: 143.1 micrograms
> Average annual PM10 pollution per cubic meter: 292.3 micrograms