, Nov. 1 -- Dhaka, the overcrowded capital city of Bangladesh, has ranked 20th on the list of cities with the worst air quality with an AQI score of 81 at 09:09 am this morning.

Dhaka's air was classified as 'moderate,' on Saturday referring to a light healthy threat, according to the AQI index.

Pakistan's Lahore, India's Delhi and China's Shanghai occupied the first, second and third spots on the list, with AQI scores of 384, 232, and 208, 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...