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Man-made air pollution is decreasing, but overall air pollution is worse due in part of wildfire smoke, according to a new ...
Air pollution fell substantially as the city restricted car traffic and made way for parks and bike lanes. Over the past 20 ...
Almost half of everyone who lives in the United States breathes unhealthy levels of air pollution ... an area with a failing grade for year-round particle pollution, the second-highest number ...
Nearly half of all Americans now live in places with unhealthy air, and the Bay Area metro is among the top 20 in poor air ...
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