Although air pollution decreased in major cities across the globe during coronavirus lockdowns Dhaka again ranked worst in the Air Quality Index (AQI) on Thursday morning.
The capital ranked the worst in the Air Quality Index (AQI) with a score of 227 at 08:34 am. The air was classified as ‘very unhealthy’, media reports.
When the AQI value is between 201 and 300, everyone may begin to experience more serious health effects.
A numerical value between 150 and 200 indicates that everyone may begin to experience health effects. Members of sensitive groups may experience more serious health effects.
China’s Beijing and Afghanistan’s Kabul occupied the first and second spots in the list of cities with worst air with scores of 170 and 157 respectively.
The AQI, an index for reporting daily air quality, tells people how clean or polluted the air of a certain city is, and what associated health effects might be a concern for them
Dhaka, one of the most densely populated cities in the world, has been grappling with air pollution for a long time.
In Bangladesh, the AQI is based on five criteria pollutants – Particulate Matter (PM10 and PM2.5), NO2, CO, SO2, and Ozone (O3).
A score between 201 and 300 is classified as ‘very unhealthy’. If the score is between 301 and 500, then it is classified as ‘hazardous’.
Dhaka has long been grappling with air pollution. Its air quality usually improves during monsoon.
Bangladesh has shut down educational institutions, mass transport, and non-essential services and restricted the movement of people and vehicles to tackle the spread of coronavirus.
People have been asked to stay indoors.