BANGKOK: The northern Thai city of Chiang Mai was ranked as the seventh most polluted in the world on Tuesday (March 25), ...

The northern Thai city of Chiang Mai was ranked as the seventh most polluted in the world on Tuesday, according to air-quality monitoring website IQAir.

Dhaka ranked third on the list of cities worldwide with the worst air quality, with an AQI score of 184 at 9am on Tuesday.

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