UNB :
Dhaka ranked third on the list of cities worldwide with the worst air quality Friday morning.
Its air quality was in the unhealthy zone with an Air Quality Index (AQI) score of 187 at 8:30am.
Vietnam’s Hanoi and Sarajevo of Bosnia Herzegovina occupied the first two spots on the list, with AQI scores of 257 and 208, respectively.
An AQI score between 101 and 200 is considered unhealthy, particularly for sensitive groups while 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.
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 in winter and improves during the monsoon.
Air pollution consistently ranks among the top risk factors for death and disability worldwide.
Breathing polluted air has long been recognized as increasing a person’s chances of developing a heart disease, chronic respiratory diseases, lung infections and cancer, according to several studies.
Per the World Health Organization (WHO), air pollution kills an estimated seven million people worldwide every year.