Dhaka, Oct. 13 -- Dhaka ranked 8th among the world's most polluted cities on Tuesday morning, recording an Air Quality Index (AQI) score of 158 at 09:52 am.

The air quality was classified as 'unhealthy', meaning the concentration of pollutants in the air had reached a level that could pose health risks to the general population, according to the AQI scale.

Lahore in Pakistan ranked first with an AQI score of 201, while Singapore in Singapore and Delhi in India ranked second jointly with a score of 196, followed by Hanoi in Vietnam third place with an AQI score of 186.

According to AQI standards, a reading between 101 and 150 is considered 'unhealthy for sensitive groups', while 151 to 200 is classified as 'unhealthy'. A reading between...