Dhaka air quality improves after morning rain03 October 2022
City Desk :
Bangladesh's capital Dhaka saw an improvement in its air quality on Sunday morning as showers lashed the city in the early hours of the day.
Dhaka's air quality turned "moderate" in the Air Quality Index (AQI) with a score of 62 at 9am on Sunday and it ranked 26th on the list of world cities with the worst air quality, reports UNB.
An AQI score between 50 and 100 is considered "moderate" with acceptable air quality. However, there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.
Uzbekistan's Tashkent, Pakistan's Lahore and India's Delhi occupied the first three spots in the list, with AQI scores of 193, 166 and 157 respectively.
An AQI score between 101 and 200 is considered "unhealthy", particularly for sensitive groups.
Similarly, an AQI score between 201 and 300 is said to be "poor", while a reading of 301 to 400 is considered "hazardous", posing serious health risks to residents.
The AQI is based on five criteria -- 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 in polluted air has long been recognized as increasing a person's chances of developing heart disease, chronic respiratory diseases, lung infections and cancer, according to several studies.
According to the World Health Organization (WHO), air pollution kills an estimated 7 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.