Dhaka, April 16 -- Dhaka, the densely populated capital of Bangladesh, ranked 6th among the world's most polluted cities on Thursday morning, recording an Air Quality Index (AQI) of 181 at 08:45 am.

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

Delhi in India, Lahore in Pakistan and Beijing in China occupied the top three positions on the list, with AQI scores of 317, 205 and 190 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, which report...