Dhaka’s air remained in the ‘moderate‘ zone this morning.

With an air quality index score of 89 at 9:00 am, Dhaka ranked 15th on the list of cities worldwide with the worst air quality.

Indonesia's Jakarta, China's Shanghai, and India's Delhi occupied the first three spots on the list, with AQI scores of 177, 145 and 140 respectively.

An AQI between 51 and 100 is considered ‘moderate’, AQI between 101 and 150 is considered ‘unhealthy’, and between 201 and 300 is said to be ‘very unhealthy’, while a reading of 301 and above is considered ‘hazardous’, posing serious health risks to residents.

Dhaka's air quality continues to be in 'moderate' zone

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 recognised as increasing a person’s chances of developing a heart disease, chronic respiratory diseases, lung infections and cancer, according to several studies.

As per the World Health Organisation, 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.