Energy

Colorado wants to make its big buildings more efficient — but first it needs their energy data

Colorado air regulators vastly underestimated ozone pollution from some oil and gas operations due to a data error

An environmental task force met for a year to learn how to protect vulnerable communities. Here are 5 key findings

Cañon City voted to break up with its power provider. Two years later, they’re still together

A Colorado company that runs a controversial uranium mill in Utah says it’s trying to be a good neighbor

After California, Colorado could become the second state to stop subsidizing natural gas connections

Frustrated with their utilities, some Coloradans want the state to change its rules so communities can buy their own electricity

Xcel Energy Colorado has a new boss. He says the trend of rising energy bills won’t stop anytime soon

Republican gubernatorial candidate Heidi Ganahl wants to reduce regulation amid inflation and eliminate the state income tax

Industry shake-ups have delayed or canceled many utility solar projects in Colorado, but brighter days could be ahead

This climate-friendly house for Marshall fire victims isn’t a luxury home

Rangely is surrounded by a coal mine and more than 1,000 oil wells. What will happen to it when we stop burning fossil fuels?

Heidi Ganahl’s transportation plan would refocus spending on driving and undo some Jared Polis-supported legislation

Coloradans are so bad at composting, whole truckloads are being rejected and sent to the dump

A heat wave wasn’t the only reason Xcel Energy locked customers out of their thermostats — their largest coal plant broke down