According to the ranking in IQAir's 2024 World Air Quality Report, these are the 10 U.S. cities with the worst pollution in North America: While eight of the most polluted U.S. cities in North ...
air pollution guidelines. As this map reveals, 91 per cent of all countries had unsafe levels of air pollution in 2024. Chad, Congo, Bangladesh, Pakistan and India had the dirtiest air.
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