Joshua Tree National Park is among the hundreds of sites across the country being significantly impacted by air pollution, according to a report that was released Tuesday.
The National Parks Conservation Association's report identifies Joshua Tree, along with the Mojave National Preserve and Sequoia and Kings Canyon national parks, as sites with the worst air quality. It indicates those parks often struggle with air that's unhealthy to visitors and comparable to conditions in densely populated cities like Los Angeles.
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