Sunday, 29 January, 2023

Dhaka world’s most polluted city

Dhaka world’s most polluted city

Dhaka has once again topped the list of world cities with the worst air quality, reports UNB.

The capital’s air quality index (AQI) was recorded at 221 at 09:04 am on Saturday.

India’s Delhi and Ghana’s Accra occupied the next two spots, with AQI scores of 203 and 199, respectively.

An AQI between 101 and 200 is considered ‘unhealthy’, particularly for sensitive groups.

Similarly, 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.

Dhaka has long been grappling with air pollution issues. Its air quality usually turns unhealthy during winter and improves during monsoon.

A report by the Department of Environment (DoE) and the World Bank in March 2019 pointed out that the three main sources of air pollution in Dhaka “are brick kilns, fumes from vehicles and dust from construction sites”.