Dhaka occupied the 4th position on Monday morning in the list of world cities with the worst air quality.
The city’s Air Quality Index (AQI) score was 178 around 09.44 am, indicating that the quality was unhealthy.
Pakistan’s Lahore and India’s Delhi and Croatia’s Zagreb occupied the first three slots with AQI scores of 398, 220 and 197 respectively.
An AQI between 101 and 200 is considered 'unhealthy', particularly for sensitive groups of people like children and elderly population.
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.
Read Dhaka is world's most polluted city
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. Its air quality usually turns unhealthy during winter and improves during monsoon.