Environmentalists fear it could set a dangerous precedent.

Colorado election officials say legal uncertainty shrouds the potential impact of Trump’s executive order on mail ballots.

Coal is perhaps most closely associated with Appalachian states like West Virginia, Pennsylvania and Kentucky — or Wyoming, the nation's leading producer of the fossil fuel. But the coal-mining business was once thriving in northern Arizona as well, atop the Colorado Plateau.

Western cattlemen are poised to lose almost all opportunity to comment on oil and gas development underneath their property.

Colorado, Utah, New Mexico and Wyoming are not subject to mandatory reductions; instead, those states are setting up programs to voluntarily conserve water.