The 10 cities in the US with the worst air pollution in 2023 got a major boost from wildfires, according to a new study, clocking levels of pollution that are far above the maximum safe levels.But big cities like , , and , places that many people associate with low air quality, weren't anywhere near the top 10 in the world, let alone in the country. In its annual survey of the world's worst cities for air pollution, Swiss air technology company IQAir found that over 1,000 cities in the US experienced air pollution levels multiple times higher than the international standard for poor air quality.
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