Dhaka, Feb. 10 -- Dhaka, the densely populated capital of Bangladesh, ranked second among the world's most polluted cities on Tuesday morning, recording an Air Quality Index (AQI) of 288 at 9:20 am.

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

Delhi in India, Lahore in Pakistan, and Kolkata in India occupied the first, third, and fourth spots on the list, with AQI scores of 306, 234, and 219 respectively.

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 levels of 101-150 are 'unhealthy for sensitive groups', 151-20...