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Chiang Mai still smog-bound, but no longer world’s most polluted city

March 19, 2019

Chiang Mai finally lost top spot but remained very polluted on Tuesday as it fell to the fourth most polluted city on the planet, scoring 182 in the air quality index (AQI) at airvisual.com.

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Chiang Mai still smog-bound, but no longer world’s most polluted city