The energy secretary, a longtime oil and gas executive, said climate change was a real physical phenomenon but not a crisis.

Colorado lawmakers and Gov. Jared Polis’ office are weighing legislation that would require 100% of the state’s energy to ...

Gas stations across Colorado would have to post a sticker warning drivers that their fuel use contributes to climate change ...

Despite protests from environmental groups, Gov. Jared Polis signed a bill defining nuclear energy as a “clean energy ...

Seven western states rely on the Colorado River Basin, but drought and climate change are causing water shortages in the ...

Axios Visuals Most major U.S. cities are suffering from longer allergy seasons amid human-caused climate change — but not Denver, a new analysis finds. Driving the news: The freeze-free growing season ...

Prosecutors drop Dale Williams murder case; have room to refile in future. Former defendant professes innocence; wanted dismissal that would preclude refiling ...

The topic surrounding the Earth, its heating climate, and what we can do about it, is a daunting conversation for many, but a ...