Dhaka, March 16 -- Dhaka has ranked the 15th on the list of cities with the worst air quality with an AQI score of 128 at 8:27 am on Sunday morning.

The air was classified as "unhealthy for sensitive groups", referring to a health risk to residents, according to the AQI index.

Thailand's Chiang Mai, Qatar's Doha and Azerbaijan's Baku occupied the first, second, and third spots on the list, respectively with AQI scores of 171, 162 and 160, respectively.

When the AQI value for particle pollution is between 50 and 100, air quality is considered 'moderate', usually sensitive individuals should consider limiting prolonged outdoor exertion, between 101 and 150, air quality is considered 'unhealthy for sensitive groups', between 150 and 200 i...