Dhaka, Feb. 20 -- Dhaka, the densely populated capital of Bangladesh, ranked second among the world's most polluted cities on Friday morning, recording an Air Quality Index (AQI) of 299 at 08:45 am.

Today, the city's air was classified as 'very unhealthy', indicating a serious health threat, according to the AQI report.

Lahore in Pakistan, Delhi in India, and Kolakata in India occupied the first, third, and fourth spots on the list, with AQI scores of 320, 208, and 192 respectively.

Dhaka records AQI 222, ranks third in world pollution index

According to the AQI scale, a reading between 50 and 100 is considered 'moderate', with generally acceptable air quality, though sensitive individuals should limit prolonged outdoor exertion. AQI ...