, April 12 -- Dhaka, the densely populated capital of Bangladesh, ranked 10th among the world's most polluted cities on Wednesday morning, recording an Air Quality Index (AQI) of 153 at 10:48 am.

The air quality was classified as 'unhealthy', indicating potential health risks for the general population, according to the AQI scale.

Chiang Mai in Thailand, Baghdad in Iraq and Riyadh in Saudi Arabia occupied the top three positions on the list, with AQI scores of 206, 201 and 191 respectively.

According to AQI standards, a reading between 101 and 150 is considered 'unhealthy for sensitive groups', 151 to 200 'unhealthy', 201 to 300 'very unhealthy', while levels above 301 are deemed 'hazardous', posing serious health risks.

The AQI, whic...