The world's most and least polluted countries ranked
Frances Carruthers
22 April 2021
The silent killer
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Most polluted countries – Kuwait: 34 µg/m3 in 2020
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China: 34.7 µg/m3 in 2020
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Mali: 37.9 µg/m3 in 2020
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Nepal: 39.2 µg/m3 in 2020
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Bahrain: 39.7 µg/m3 in 2020
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Bosnia and Herzegovina: 40.6 µg/m3 in 2020
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Indonesia: 40.7 µg/m3 in 2020
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Kyrgyzstan: 43.5 µg/m3 in 2020
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Qatar: 44.3 µg/m3 in 2020
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Oman: 44.4 µg/m3 in 2020
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Afghanistan: 46.5 µg/m3 in 2020
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Mongolia: 46.6 µg/m3 in 2020
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India: 51.9 µg/m3 in 2020
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Pakistan: 59 µg/m3 in 2020
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Bangladesh: 77.1 µg/m3 in 2020
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Least polluted countries – United Kingdom: 8.3 µg/m3 in 2020
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Costa Rica: 8.2 µg/m3 in 2020
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Ecuador: 7.6 µg/m3 in 2020
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Australia: 7.6 µg/m3 in 2020
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Andorra: 7.4 µg/m3 in 2020
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Canada: 7.3 µg/m3 in 2020
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Iceland: 7.2 µg/m3 in 2020
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New Zealand: 7.0 µg/m3 in 2020
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Estonia: 5.9 µg/m3 in 2020
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Norway: 5.7 µg/m3 in 2020
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Finland: 5.0 µg/m3 in 2020
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Sweden: 5.0 µg/m3 in 2020
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US Virgin Islands: 3.7 µg/m3 in 2020
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New Caledonia: 3.7 µg/m3 in 2020
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Puerto Rico: 3.7 µg/m3 in 2020
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