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EPA Finds Unhealthy Smog Levels in National Parks

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EPA Finds Unhealthy Smog Levels in National Parks

Science

EPA Finds Unhealthy Smog Levels in National Parks

EPA Finds Unhealthy Smog Levels in National Parks

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  • <iframe src="https://www.npr.org/player/embed/1838166/1838167" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">

The Environmental Protection Agency will announce rules Thursday intended to reduce air pollution nationwide. Among 490 counties designated as having unhealthy levels of smog are some of the nation's most popular national parks. NPR's Allison Aubrey reports.