The densely populated capital of Bangladesh has once again been rated as the world's second-most polluted city.
Dhaka's air quality index (AQI) was recorded at 204 at 08.56am on Thursday, which is considered 'poor' or 'very unhealthy'.
India’s Delhi and North Macedonia’s Skopje occupied the first and third spots, with AQI scores of 241 and 195, respectively, in the latest list of world cities with the worst air quality.
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.
AQI, an index for reporting daily air quality, is used by government agencies to inform people how clean or polluted the air of a certain city is, and what associated health effects might be a concern for them.
In Bangladesh, the AQI is based on five criteria pollutants -- Particulate Matter (PM10 and PM2.5), NO2, CO, SO2 and Ozone.