Printed on Wed Aug 10 2022 4:21:50 PM

Dhaka is the second most polluted city in world

Staff Correspondent
National
most polluted city
Dhaka, the capital of Bangladesh, is the second most polluted city in the world.

At 8:56 a.m. on Thursday, Dhaka's Air Quality Index (AQI) recorded 204, which is considered 'very unhealthy'.

Delhi, India, and northern Macedonia topped the list with 241 and 195 AQI, respectively.

An AQI score of 151 to 200 can affect the health of everyone in the city, especially children, the elderly, and the sick.

In addition, if it is 300 to 201, it is considered as an emergency with a health alert. In this case, children, the elderly, and the sick are advised to limit their activities inside the house and others outside the house.

Air quality is considered risky if the AQI score is 301 to 500 or higher. At this time it is considered an emergency for every city dweller including health alert.

The AQI index, based on daily air quality, informs people about the clean or polluted air in a particular city and any health risks that may arise for them.

In Bangladesh, AQI is determined based on five types of pollution - particulate matter (PM10 and PM2.5), NO2, CO2, SO2, and ozone (O3).

Dhaka has been suffering from air pollution for a long time. Its air quality usually becomes unhealthy in winter and somewhat improved during monsoon.

In March 2019, a report by the Department of Environment and the World Bank stated that the three main sources of air pollution in Dhaka are brick kilns, vehicle fumes, and construction site dust.

According to the United Nations, 9 out of 10 people worldwide breathe in polluted air, and an estimated 7 million people die prematurely each year in low- and middle-income countries due to air pollution.

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