Items by Cally Carswell
In a high-stakes legal battle, EPA defends its ability to regulate greenhouse gases under the Clean Air Act
Obama overlooks the environment in his State of the Union address, but heaps attention on domestic energy development
Migrating animals can't read "no trespassing" signs, so it’s up to human beings to try to find ways to connect wildlife corridors that crisscross public and privately owned lands.
Pavillion, Wyo., residents learn what's in their tainted water, but can't say if gas drilling fouled it
The Environmental Protection Agency is attempting to reduce haze from air pollution near national parks and wilderness; some coal-fired power plants are cleaning up their act and others will shut down.
Scientists pinpoint the cause of white nose syndrome, which has devastated Eastern bat populations and could move West
Feral pigs are invading New Mexico and other Western states, but biologists are working hard to stop them.
A recent oil spill in Montana's Yellowstone River reminds Westerners that not all such environmental disasters happen in the Gulf of Mexico.
Jonathan Thompson talks with Cally Carswell about how foreign demand is influencing the West's latest extractive boom.