World's Most Polluted Countries

The Air Quality Index, or AQI, is the system used to warn the public when air pollution is dangerous. The AQI tracks ozone and particle pollution, as well as four other widespread air pollutants

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Cameroon is the world's most polluted country in 2024, with pollution index of 93.8, as per the latest international rankings by Numbeo

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Myanmar is the second most polluted country in the world, with pollution index of 89.8

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Lebanon stood at number 3, with pollution index of 89.4

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Nigeria and Ghana are at number 4 and number 5 with pollution index of 87.9

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Mongolia made it to number 6 on the list with pollution index of 87.7

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