Environment

National Park Service Celebrates 100th Anniversary

The National Park Service is celebrating the 100th anniversary of its creation this year. NPR spends time on the job with workers in the country's busiest national park, Great Smoky Mountains National Park, to explore the vast variety of work the park service does and the challenges it's facing.

U.S. Proposes Removing Yellowstone Grizzly Bears From Endangered Species List

Grizzly bears in Yellowstone may soon lose protection from the federal government. The U.S. Fish and Wildlife Service proposed taking the bears off the endangered species list, saying the population has recovered to a self-sustaining number. Opponents dispute that, in part because they say federal biologists aren't sufficiently accounting for climate change threatening their food sources.