Dhaka, the bustling capital of Bangladesh, has once again made headlines for its poor air quality. On Wednesday, the city recorded an alarming Air Quality Index (AQI) of 282, making it the second most polluted city globally, just behind Delhi, which had an AQI of 326.
This rating falls into the ‘very unhealthy’ category, indicating a serious health threat for residents. Kolkata and Karachi followed Dhaka, scoring 193 and 176, respectively. Understanding these numbers is crucial. An AQI between 50 and 100 is deemed ‘moderate,’ which means the air quality is generally acceptable. However, higher levels can pose significant health risks, especially for vulnerable populations.
The AQI is calculated based on five main pollutants: particulate matter (PM10 and PM2.5), nitrogen dioxide (NO2), carbon monoxide (CO), sulfur dioxide (SO2), and ozone. Each of these pollutants can affect health in various ways. For instance, PM2.5 particles are small enough to enter the bloodstream, potentially causing serious health issues like heart disease and respiratory problems.
Pollution in Dhaka often worsens during the winter months and tends to improve after the rains. According to the World Health Organization, air pollution accounts for about seven million deaths globally each year, with major health impacts including strokes and lung cancer.
Many residents are becoming increasingly aware of these dangers. Social media has seen a surge in discussions about air quality, with users sharing tips on how to minimize exposure. It’s not just a local issue; experts are calling for more stringent regulations globally to combat air pollution. A recent study from the Lancet found that cities can significantly reduce pollution levels by investing in green spaces and sustainable transport options.
In a city like Dhaka, where the population density is astoundingly high, tackling air pollution requires collective efforts from both the government and citizens. Regular monitoring and public education about air quality are essential for a healthier future.
For more information about air quality and its effects, you can read the World Health Organization’s report [here](https://www.who.int/news-room/fact-sheets/detail/air-pollution).
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