Dhaka, May 3 -- Dhaka's air quality was categorised as 'unhealthy' this morning.

With an air quality index (AQI) score of 158 at 9:33am, Dhaka ranked sixth on the list of cities worldwide with the worst air quality.

Dhaka's air 'unhealthy for sensitive groups' this morning

India's Delhi, Nepal's Kathmandu and Pakistan's Lahore occupied the first three spots on the list, with AQI scores of 318, 197 and 193 respectively.

When the AQI value for particle pollution is between 101 and 150, air quality is considered 'unhealthy for sensitive groups', between 150 and 200 is 'unhealthy', between 201 and 300 is said to be 'very unhealthy', while a reading of 301+ is considered 'hazardous', posing serious health risks to residents.

Dhaka's air q...