Dhaka, the bustling capital of Bangladesh, recently ranked as the fourth most polluted city in the world. On a Sunday morning, it recorded an Air Quality Index (AQI) score of 138, putting it in the ‘unhealthy for sensitive groups’ category. This means that people with conditions like asthma or heart disease may face risks from the air quality.
Hanoi in Vietnam, Kolkata, and Delhi in India took the top three spots on the pollution list, with AQI scores of 155, 142, and 142, respectively. The AQI scale is pretty straightforward. Scores from 101 to 150 indicate air that isn’t great for those sensitive to pollution. Anything over 150 is classified as ‘unhealthy’ and can affect more people.
But what exactly does the AQI measure? It tracks five main pollutants: particulate matter (both PM10 and PM2.5), nitrogen dioxide, carbon monoxide, sulfur dioxide, and ozone. These substances can come from vehicle emissions, industrial activities, and even natural sources like dust storms.
Air quality has been a long-standing issue in Dhaka. Typically, pollution is worse in winter and slightly better during the monsoon rains, which can wash away some pollutants. This problem isn’t unique to Bangladesh. A recent World Health Organization report states that air pollution causes around seven million deaths globally each year, mostly from conditions like heart disease and lung cancer.
Interestingly, local reactions often take to social media. Many residents express concerns about daily living in such conditions. A Twitter trend has emerged, with users calling for more sustainable practices and better regulation of emissions. It’s a reminder that social media can amplify local voices and concerns regarding health and the environment.
Air quality is more than just numbers. It impacts daily life, health, and even the economy. Poor air quality can strain healthcare systems and reduce productivity. As awareness grows, so does the push for cleaner air and policies that promote sustainable practices.
For further details about air quality measurements and health impacts, you can visit the [World Health Organization](https://www.who.int) website.
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