Dhaka, Oct. 14 -- Dhaka ranked 5th among the world's most polluted cities on Wednesday morning, recording an Air Quality Index (AQI) score of 175 at 10:20 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.

Singapore in Singapore ranked first with an AQI score of 194, while Delhi in India ranked second with a score of 180, followed by Kuala Lumpur in Malaysia third place with an AQI score of 177.

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 201 and 300 is consi...