Bangladesh's densely populated capital, Dhaka, ranked as the city with the second-worst air quality worldwide, recording an Air Quality Index (AQI) score of 518 at 8:16am on Wednesday.
Today’s air was classified as “hazardous”. This means that the air quality is extremely poor and there is an emergency health warning, according to the AQI index.
When the AQI value for particle pollution is between 50 and 100, air quality is considered ‘moderate’, usually sensitive individuals should consider limiting prolonged outdoor exertion, between 101 and 150, air quality is considered ‘unhealthy for sensitive groups’, between 150 and 200 is ‘unhealthy’, between 201 and 300 is said to be 'very unhealthy', while a reading of 301+ is considered 'hazardous', posing serious health risks to residents.
Bosnia Herzegovina's Sarajevo, Democratic Republic of the Congo’s Kinshasa and India’s Kolkata occupied the first, third and fourth spots on the list, with AQI scores of 528, 310 and 292 respectively.
The AQI, an index for reporting daily air quality, informs people how clean or polluted the air of a certain city is and what associated health effects might be a concern for them.
The AQI in Bangladesh is based on five 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.
As per the World Health Organization (WHO), air pollution kills an estimated seven million people worldwide every year, mainly due to increased mortality from stroke, heart disease, chronic obstructive pulmonary disease, lung cancer, and acute respiratory infections.
Bd-pratidin English/Fariha Nowshin Chinika
