Dan Boyce

Forest officials closed the San Juan National Forest in southwest Colorado because of "historic levels" of fire danger. The closure will affect local tourism economies.

Wildfires have forced the evacuation of people from about 2,000 homes in southwestern Colorado, and the U.S. Forest Service will close the 1.8 million acre San Juan National Forest.

Dozens of cities are vowing to cut their carbon emissions and uphold the U.S. commitment to the Paris climate deal. Despite progress, many are falling short of their most ambitious goals.

The former uranium mining town of Uravan, Colo., was once declared too toxic for humans and razed to the ground. But that's not stopping former residents from gathering there for an annual picnic.

Colorado is reviewing oil and gas operations after a fatal home explosion was linked to an abandoned, but still leaking, gas line. The tragedy is raising questions about how older wells are regulated.

Europe has extracted natural gas from organic waste for about a decade, and now it's spreading to the U.S. In Colorado, efforts are under way to produce natural gas from human waste and food scraps.

The Obama administration's Clean Power Plan has divided the states. It requires carbon emission reductions from power plants, and more than two dozen states have sued to stop it. But many others are in favor. This tug of war is playing out in Colorado and could head to the state Supreme Court.

The Environmental Protection Agency has released its much-anticipated ozone standards. The agency is setting more stringent thresholds for the particles that contribute to smog.

The group has been meeting for months to find compromise on whether local governments should be given more say when drilling is proposed near residential and urban areas.

Solar energy had a banner year in 2014, but as more U.S. households make their own electricity, they're paying electric utilities less. Utility companies across the nation are fighting back.