Dhaka, June 8 -- Dhaka ranked 21st among the world's most polluted cities on Monday morning, recording an Air Quality Index (AQI) score of 73 at 9:15 am.

According to the AQI ranking, the capital's air quality was classified as 'moderate'.

Lahore in Pakistan topped the list with an AQI score of 169, followed by Santiago in Chile with 147 and Kinshasa with 144.

Under the AQI scale, a reading between 50 and 100 is considered 'moderate', indicating generally acceptable air quality. However, unusually sensitive individuals may experience minor health concerns and are advised to limit prolonged outdoor exertion.

An AQI reading between 101 and 150 is considered 'unhealthy for sensitive groups', while 151-200 is categorised as 'unhealthy'. R...