, Dec. 20 -- Dhaka has ranked sixth on the list of cities worldwide with the worst air quality with an AQI score of 202 at 8:54 am this morning.

Dhaka's air this morning was classified as 'unhealthy', according to the air quality index.

Afghanistan's Kabul, India's Delhi, Bahrain's Manama, India's Kolkata and Pakistan's Karachi occupied the first five spots in the list of cities with worst air quality with AQI scores of 495, 393, 264, 226 and 203 respectively.

'Unhealthy' air quality persists in densely populated Dhaka

When the AQI value for particle pollution is between 50 and 100, air quality is considered 'moderate', between 101 and 150, air quality is considered 'unhealthy for sensitive groups', between 150 and 200 is 'unhealthy',...