Gov. John Hickenlooper criticized the move, saying Colorado "can achieve the clean air goals set by the EPA," and that the lawsuit "will create uncertainty."
Energy and Environment
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Intense debate of the topic is expected during a Congressional hearing Wednesday.
- The bust of the coal-bed methane industry has left Wyoming responsible for the exorbitant cost of plugging thousands of wells. The price tag for dealing with deep oil and gas wells may be even higher.Read More
The plant is intended to replace a temporary system established to treat nearly 600 gallons of water draining from the mine every minute.
Now 81, the famous conservationist focuses heavily on her youth-driven program "Roots & Shoots," which has a presence throughout Colorado.
The Americas Latino Eco Festival begins Thursday, and one session uses data from a recent poll to debunk assumptions about Latinos and the environment.
The 2013 floods hit the Front Range. We map how money available in the aftermath will go to places as far away as Grand Junction.
It's possible the growers "came to the conclusion that Colorado's climate this year is a little bit more hospitable, U.S. Attorney John Walsh says.
Scientists come from around the world to the Rocky Mountain Biological Laboratory to study the water, flora and fauna.
- A couple is spending 365 days in the nation's most visited wilderness area to raise awareness of a sulfide-ore mining plan they say will put the watershed ecosystem in danger. Some locals disagree.Read More
The world famous primatologist visited Colorado to give a talk at CU Boulder, speak with inmates and encourage future generations to protect the planet.
Colorado air regulators say they are working to reduce ozone concentrations, but say they have unique challenges.
Secretary of the Interior Sally Jewell says nearly 100 separate but related management plans pave an important path forward for the bird.
The move prevents millions of acres of grouse habitat across 11 western states from scrutiny under the lens of the ESA.
From the Oil and Gas Task Force to honey bees, the center has worked with the players at the heart of many contentious issues over the years.