Striking new study quantifies Yellowstone tourism emissions. TLDR: it’s a lot of CO2.

Wyoming decided to keep open its elk feedgrounds. Conservationists are questioning the decision citing concern over deadly chronic wasting disease.

Advocates see Madison-Gallatin National Wildlife Monument as path toward permanent environmental protections for Greater Yellowstone.

In Teton Valley, Idaho, where water is as precious as its native trout, irrigators and environmental groups have teamed up to recharge the area’s diminishing aquifer. In the process, they want to do something novel: find someone to pay farmers for the effort.

In 1995, the gray wolf was reintroduced into Yellowstone National Park. Nearly 30 years later, Colorado has done the same. How will it play out?