A recent analysis revealed that in the past year, only 10 nations and approximately 9% of cities worldwide met the air quality standards outlined by the World Health Organization concerning harmful fine-particle pollution, known as PM2.5.
The Middle East, Africa, and Central and South Asia were identified as the regions most severely impacted by this issue.
According to a report by IQAir, a Swiss company specializing in air quality technology and global air-sensor data collection, Bangladesh, Pakistan, India, Tajikistan, and Burkina Faso emerged as the top five countries with the highest levels of air pollution in 2023, adjusted for population density.
The report notes that the data for sub-Saharan Africa is incomplete, as only 24 out of 54 countries had adequate data for inclusion.
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Conversely, French Polynesia, Mauritius, and Iceland recorded the least air pollution.
Among capital cities, New Delhi, Dhaka, Ouagadougou, Dushanbe, and Baghdad were identified as having the most severe PM2.5 pollution levels by IQAir.
Conversely, the capital cities with the lowest concentrations of PM2.5 were predominantly located in Oceania, Scandinavia, and the Caribbean, including Wellington (New Zealand), Reykjavik (Iceland), and Hamilton (Bermuda).
One of the most common forms of air pollution, PM2.5, “kills more people than any other pollutant that is out there,” said Glory Dolphin Hammes, CEO of the North American division of IQAir, which has released annual World Air Quality reports since 2017.