Dhaka: Dhaka ranked 9th among the world’s most polluted cities on Thursday morning, recording an Air Quality Index (AQI) score of 119 at 9:12 am.

According to United News of Bangladesh, the city’s air quality was classified as ‘Unhealthy for Sensitive Groups,’ which poses health risks to children, older adults, and people with heart or lung diseases, although the general public is mostly unaffected. The AQI scale provides insight into the air quality, with readings between 101 and 150 considered ‘unhealthy for sensitive groups,’ 151 to 200 ‘unhealthy,’ 201 to 300 ‘very unhealthy,’ and levels above 301 deemed ‘hazardous,’ posing serious health risks.

Kampala in Uganda topped the global pollution list with an AQI score of 173, followed by Medan in Indonesia and Cairo in Egypt, both recording an AQI score of 169. Kinshasa in the Democratic Republic of Congo ranked third with an AQI score of 166. These rankings are part of the daily AQI updates, which indicate how clean or polluted the air is and highlight potential health impacts.

In Bangladesh, the AQI calculation is based on five major pollutants: particulate matter (PM10 and PM2.5), nitrogen dioxide (NO2), carbon monoxide (CO), sulfur dioxide (SO2), and ozone. Dhaka has long struggled with air pollution, with air quality typically worsening in winter and improving during the monsoon season.

The World Health Organization estimates that air pollution causes around seven million deaths globally each year, mainly due to stroke, heart disease, chronic obstructive pulmonary disease, lung cancer, and acute respiratory infections.