Regulators took the first enforcement steps against some of Colorado’s largest oil and gas operators in an investigation into ...

Regulators took the first enforcement steps against some of Colorado’s largest oil and gas operators in an investigation into reports of falsified data on the cleanup of 404 sites in Weld ...

As Colorado River states race to finish a deal, water users face a resource altered by drought and climate change.

Boulder ENOFF returns July 17-20 with a lineup of films exploring Colorado’s environmental challenges and stories, from wolf ...

Trump is challenging Colorado’s plan to shutter coal-fired power plants, showing a rift between federal and state priorities.

Call me radical but I thought if the Greens were willing to die on any policy hill it’d be, well, green issues.

Douglas County is moving forward on a controversial sports mega complex in Sterling Ranch. On Tuesday, commissioners voted to approve a $410,000 contract for a consultant to begin early plans for the ...

Hull City Council is urging business owners to act responsibly when managing the disposal of waste. The warning follows a ...

The West’s most important river has shriveled over the past quarter century — and its leading climate scientist says things ...

When Xcel Energy stopped burning coal at its Valmont Power Station in 2017, it left 1.6 million tons of toxic coal ash on the property — and now that waste is leaching hazardous metals.