Evolving technology is making it possible to turn sewage wastewater into energy that can heat and cool large buildings. The largest such project in the U.S. is under construction in Denver.

As more companies install private fast-chargers for their own electric car owners, there are fears of a frustrating patchwork of charging stations. One small-town mayor took on the issue.

Residents of Colorado and neighboring states are digging out after one of the heaviest snowstorms on record. But it won't make more than a dent in alleviating the region's severe drought.

The country's overgrown forests need to be aggressively thinned to reduce wildfire risk. That creates massive piles of worthless brush and branches, but some businesses see a new market for them.

The move challenges a long tradition of leaving wildlife management to governments, not the public. But the vote was narrow, reflecting many people's serious concerns about bringing wolves back.

In November, Coloradans are set to vote on whether to return wolves to the state. The ballot initiative may be the first time voters in any state could force reintroduction of an endangered species.

Democrats in Colorado and New Mexico are pushing ahead with legislation to pledge their 14 collective electoral votes to the winner of the national popular vote — no matter who wins each state.

Colorado's largest school districts will be closed Friday to accommodate further teacher walkouts. Teachers are asking for better pay, more school funding and a protected retirement plan.