Dhaka, Oct. 16 -- Dhaka's air quality turned 'unhealthy' on Friday morning, with an Air Quality Index (AQI) score of 181 at 9:20am.

With the score, the capital ranked fourth among the world's most polluted cities, according to the air quality monitoring platform IQAir.

Singapore topped the list with an AQI score of 236, followed by Indonesia's Jakarta with 189 and Pakistan's Lahore with 184.

On Thursday, Dhaka ranked 26th among the world's most polluted cities, with an AQI score of 105 at 11am.

According to the AQI scale, the city's air quality was classified as "Unhealthy for Sensitive Groups", poses health risks to children, older adults, and people with heart or lung diseases, while the general public is mostly unaffected.

An AQI ...