The National Parks Conservation Association and similar groups have rated The Great Smokey Mountains National Park in Tennessee and North Carolina as having the worst air quality of all the national parks.
“In the Great Smoky Mountains, our most polluted national park, ozone pollution rivals urban areas, and even exceeds that of New York City, and Washington, D.C.,” Harvard Ayers, chairman of the group Appalachian Voices, said in a statement accompanying the report.
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