The companies’ attorneys will argue that greenhouse gas emissions released by oil and gas production from within the United ...

Proponents of creating a national monument to preserve one of Colorado’s “last, best wild places” are pivoting on strategy in the face of new President Donald Trump’s hostility to such designations ...

In December, the Federal Highway Administration awarded the first grants under a new $125 million Wildlife Crossings Pilot Program.

The Umatilla River once served as an important meeting ground for the Cayuse and their Nez Perce allies to the east. A large ...