Dhaka's air quality continued to be in the 'unhealthy' zone on Tuesday morning.
With an air quality index (AQI) score of 178 at 9:50 am, the metropolis ranked 8th in the list of world cities with the worst air quality.
An AQI between 101 and 200 is considered 'unhealthy', particularly for sensitive groups.
Pakistan’s Lahore, India’s Delhi and Pakistan’s Karachi occupied the first three spots in the list, with AQI scores of 390, 242 and 198, respectively.
An AQI between 201 and 300 is said to be 'poor', while a reading of 301 to 400 is considered 'hazardous', posing serious health risks to residents.
Read: Noise pollution: The lethal soundtrack to life in Dhaka
In Bangladesh, the AQI is based on five criteria pollutants -- Particulate Matter (PM10 and PM2.5), NO2, CO, SO2 and Ozone.
Dhaka has long been grappling with air pollution issues. Its air quality usually turns unhealthy in winter and improves during the monsoon.