CNN
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Air pollution spiked to unhealthy levels around the world in 2021, according to a new report.
The report by IQAir, a company that tracks global air quality, found that average annual air pollution in every country — and 97% of cities — exceeded the World Health Organization’s air quality guidelines, which were designed to help governments craft regulations to protect public health.
Only 222 cities of the 6,475 analyzed had average air quality that…
