Seven countries met the WHO's air quality guidlines, but not the U.S.

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Seven countries met the WHO's air quality guidlines, but not the U.S.
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Evan Bush is a science reporter for NBC News. He can be reached at [email protected].

Just seven countries met World Health Organization guidelines for air pollution in 2023, as continued reliance on fossil fuels and climate change repercussions continue to dog human health, according to a report published on Tuesday by IQAir, a Swiss air quality-monitoring company. Bangladesh, Pakistan and India had the most polluted air with levels of particle pollution at least 10 times what the World Health Organization suggests, the company said.

The report is based on information from more than 30,000 air quality monitors in 134 countries and territories, according to IQAir. The company analyzed the average level of pollution throughout the year in cities with monitoring equipment and tallied people’s exposure to particulate matter that are roughly 2.5 microns in size. Measures of pm2.5, as scientists call it, are important indicators for pollution effects on human health. “Pm2.

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