Dhaka’s air 4th worst in the world on Thursday

With an air quality index (AQI) score of 208 at 9:13 am, Dhaka ranked 4th on the list of cities worldwide with the worst air quality.

Though the number of public transport is comparatively less than on usual work days due to the ongoing blockade called by the opposition parties, Dhaka's air quality has been marked as ‘very unhealthy’ Thursday  morning.

With an air quality index (AQI) score of 208 at 9:13 am, Dhaka ranked 4th on the list of cities worldwide with the worst air quality.

India’s Delhi, Pakistan’s Lahore and India’s Kolkata occupied the first three spots in the list, with AQI scores of 463, 458 and 239, respectively.

An AQI between 101 and 150 is considered 'unhealthy', AQI between 201 and 300 is said to be 'very unhealthy', while a reading of 301+ 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.

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.