Dhaka ranks 2nd most polluted city
11 January 2022, 01:44 pm | Updated: 23 November 2024, 11:00 pm
Dhaka has been ranked second-most polluted in the latest list of world cities with the worst air quality being categorised as 'very unhealthy'.
The city recorded a fall in air pollution with its air quality index (AQI) hitting 200 around 11am on Sunday.
China’s Wuhan occupied the top spot with an AQI score of 218, while India’s Kolkata ranked third with an AQI of 193 in the latest list of world cities with the worst air quality.
An AQI between 151 and 200 is said to be ‘unhealthAir quality in this ‘hazardous’ range triggers health warnings of emergency conditions by media outlets.
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.
Dhaka has long been grappling with air pollution issues. Its air quality usually turns unhealthy during winter and improves during monsoon.
