When two Colorado mountain towns considered steps to transition local homes and businesses away from fossil fuels, they ran into a powerful opponent: their local gas utility.

Five gray wolves now have a new home in Colorado. It's part of a plan to restore biodiversity and reintroduce the predators, 80 years after they were eradicated in the state.

Methane is a greenhouse gas that often leaks from drilling sites and pipelines. A new satellite will hunt for methane leaks worldwide, which could significantly slow down global warming.

Colorado is leading the way on standards for green hydrogen, a young industry that could play a major role in helping the U.S. meet its climate goals.

In most states, utility ratepayers subsidize the cost of extending service to a new customers. Colorado could join California in getting rid of the incentive as the states work to meet climate goals.

More than 1,000 homes were lost in the Marshall fire in Colorado last December. Now residents are wondering if they can afford to rebuild in adherence with a new green building code.

The Energy Department recently updated efficiency rules for manufactured homes. Energy efficiency advocates wanted higher standards — while the industry warns the rules will raise home prices.

On Earth Day, Colorado climate activist Alan Bruce lit himself on fire outside the U.S. Supreme Court. He died of his injuries the next day. His friends and family say his intentions remain unclear.

The Marshall Fire destroyed more than 500 homes in Louisville, Colo., in December. Homeowners who want to rebuild face a new set of green building codes. To some, they look like an expensive obstacle.

Colorado is investigating the cause of last week's wildfire. The state, however, doesn't have a very good track record when it comes to determining the cause of those fires.

Wildfires this week burned hundreds of homes in Colorado. Affected communities are taking stock of their losses and trying to make sense of a disaster that no one expected would occur in winter.

Tens of thousands were forced to flee and hundreds of homes burned after high winds pushed wildfires across several communities outside Denver.

Colorado's governor has declared a state of emergency as winds are driving several large grass fires. Two towns in Boulder County have been evacuated with more than 20,000 people fleeing the fires.

Colorado is fighting poverty and climate change by retrofitting low-income homes. The state is expected to get a boost from the new infrastructure law. (Story originally aired on ATC on Dec. 2. 2021)

Colorado is trying to fight both poverty and climate change by retrofitting low-income homes. Now the state set to get a big boost from the new federal infrastructure law.

The Biden administration wants to crack down on climate-warming methane emissions. Success will depend on a growing new industry in high-tech ways to detect methane leaks.

As coal plants shut down, many places face the loss of jobs and taxes. But in Colorado, one town hopes to transform a coal plant into a new kind of renewable energy storage.

Wildfires, and the scorched hillsides they leave behind, can threaten drinking water for years after the smoke clears. One Colorado community is trying to get ahead of the problem.

After years of frustration over air pollution, a petroleum refinery in Colorado agreed to a settlement. Nearby residents are spending some of that money to set up air monitors around the plant.

Many National Forests are closed to recreation due to fire danger and fire experts are urging the public to be careful with fireworks over the July 4th weekend as drought grips much of the country.