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Ashulia teacher killing: Prime accused Jitu arrested No teacher should have to suffer such barbarity Zero possibility of salt crisis during Eid: salt traders HC stays exemption of alleged rapist, orders to surrender before Nilphamari tribunal in 4 weeks Narcotics trade thriving despite law enforcers’ efforts Highest bid Tk 53 lakh for Range Rover at Ctg customs’ auction for 108 cars Video of biker “making away without paying” Padma Bridge toll goes viral North Bangladesh may see another flood after Eid Banks asked to open booths at cattle markets to detect fake notes Police FC beat Muktijoddha Sangsad Lyon bags five in spin battle at Galle After Padma Bridge, motorbikes might be banned on Dhaka-Mawa Expressway $68bn UK firm CEO quits job to “just sit at the beach, do nothing” Spike in Covid-19: No deaths, 2,241 cases reported in 24 hours; positivity rate 15.23% Bangladeshi company to invest $8.5 million in Uttara EPZ
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Air pollution

Dhaka again ranks world's most polluted city

UNB, Dhaka
Sat Mar 5, 2022 10:58 AM Last update on: Sun Mar 6, 2022 04:46 PM
Dhaka again ranks world's most polluted city
Star file photo

Dhaka's air quality index (AQI) was recorded at 184 at 8:48am today, once again making the capital's air most polluted in the world.

Saudi Arabia's Riyadh and China's Wuhan occupied the next two spots, with AQI scores of 180 and 173 respectively.

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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".

With the advent of winter, the city's air quality starts deteriorating sharply due to the massive discharge of pollutant particles from construction works, rundown roads, brick kilns and other sources.

Air pollution consistently ranks among the top risk factors for death and disability worldwide. Breathing polluted air has long been recognised as increasing a person's chances of developing heart disease, chronic respiratory diseases, lung infections and cancer, according to several studies.

As per the World Health Organization (WHO), air pollution kills an estimated seven million people worldwide every year, largely as a result of increased mortality from stroke, heart disease, chronic obstructive pulmonary disease, lung cancer and acute respiratory infections.

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Air Pollution in Bangladesh / Dhaka world's most polluted city / Air Pollution in Dhaka City
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