The president of Xcel's Colorado operations answered questions about the road to come.
The rural electricity provider in Colorado coal country is parting ways because Tri State is too closely tied to fossil fuels.
Homeowners could offset that increase in fees by installing renewable energy systems.
A carbon dioxide test center in Wyoming captures CO2 from burning coal before it enters the atmosphere.
From 100 renewable energy goals, to electric cars and even the race for governor, green energy may be on the tip of our tongues this year.
Weld County Commissioners say the Heartland Biogas Project does not have a valid permit to operate.
Because of its innovations in clean energy, the northern Colorado city is one of six included in an ongoing exhibition at the Smithsonian's American History Museum.
- She says the federal goal to reduce carbon emissions by 32 percent over the next 15 years raises "significant concerns for Colorado."Read more
Overall, federal government wants to reduce emissions by 32 percent over the next 15 years. Colorado appears well positioned to meet that goal.
The study's author says improvements in Colorado's air quality could prevent 63 premature deaths per year.