(Posted 04th July 2025)

Swiss air quality technology company IQAir has released its 2024 Annual World Air Quality Report, published in March 2025. This comprehensive report provides detailed insights into global air pollution trends, including rankings of the world’s most and least polluted countries, territories, and cities.
For the 2024 edition, PM2.5 air quality data was compiled from 8,954 cities across 138 countries, regions, and territories, using information from over 40,000 regulatory-grade and low-cost monitoring stations. PM2.5 (particulate matter with a diameter of 2.5 micrometers or less) is widely recognized as one of the most harmful air pollutants due to its ability to penetrate deep into the lungs and bloodstream.
According to IQAir, 12 of the 15… READ MORE

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