Dhaka, the bustling capital of Bangladesh, has once again been ranked among the cities with the worst air quality globally. On a recent Sunday morning, it recorded an alarming Air Quality Index (AQI) score of 275, making it the third most polluted city in the world that day.
To put things in perspective, Delhi topped the list with an AQI of 605, while Lahore came in second with 297. These figures are a stark reminder of the air pollution crisis affecting urban areas.
The AQI is crucial for understanding air quality and its health impacts. An AQI between 101 and 150 indicates that the air is unhealthy, especially for sensitive groups like children and the elderly. Scores between 150 and 200 signify unhealthy conditions, while anything above 300 is hazardous and can lead to serious health risks.
In Bangladesh, the AQI is calculated from five key pollutants: PM10, PM2.5, nitrogen dioxide (NO2), carbon monoxide (CO), sulfur dioxide (SO2), and ozone. Dhaka’s pollution problem is particularly severe in winter when emissions rise due to increased heating and unfavorable weather patterns. Surprisingly, the air quality tends to improve during the monsoon season when rain washes away some of these pollutants.
Despite this seasonal relief, air pollution remains a significant health issue in Dhaka. Children, the elderly, and those with pre-existing respiratory illnesses are especially vulnerable. A recent study showed that chronic exposure to polluted air can lead to long-term health issues, including respiratory diseases and cardiovascular problems.
Public reaction has been strong. Many citizens express frustration and concern about their health and the impacts on their families. Social media is buzzing with calls for action and solutions, emphasizing that something must be done to improve the air quality.
Addressing air pollution involves not just government regulations but also community efforts. Experts suggest that increasing green spaces and implementing stricter vehicle emissions standards can contribute to cleaner air. According to the World Health Organization, urban green cover can significantly reduce air pollution levels, making cities healthier places to live.
For more detailed insights and data on air quality trends, you can refer to the World Air Quality Report.
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