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Air Quality Index: Dhaka ranks worst again
Deshsangbad Desk
Published : Friday, 6 March, 2020 at 3:55 PM, Update: 27.03.2020 5:17:58 PM

Bangladesh’s capital Dhaka has ranked the worst again on the world Air Quality Index (AQI)—as its extreme air pollution makes it one of the most polluted cities.

On the real-time rankings, Dhaka scored 189 at 1:10pm on Friday, according to AirVisual, which monitors global air quality.

Dhaka's air quality was classified as ‘unhealthy.’

Vietnam’s Hanoi and China’s Beijing occupied the second and third position with AQI scores of 185 and 173 respectively.

The AQI, an index for reporting daily air quality, informs 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 (O3).

The Department of Environment has also set national ambient air quality standards for these pollutants. These standards aim to protect against adverse human health impacts.

As one of the most densely populated countries in the world, Bangladesh has been struggling with air pollution for a long time. Dhaka continuously ranks among the world’s most polluted cities.

Brick kilns, vehicles run on fuel containing higher levels sulphur, as well as construction work, have all been identified as major sources of air pollution.

Air quality further declines during the dry months—from October to April—but improves during the monsoon.

Deshsangbad/dt/fh/mmh


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