In 40 states, use of coal as a power source (as a share of all power sources) has dropped since 2004. Many of these states are increasingly relying on natural gas instead.
Energy and Environment
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Montana has one of the heaviest lifts of any state to comply with the EPA's plan to reduce carbon emissions. But the state is also rich in renewable energy, and the regulations may be a boon to some.
Republicans accused the EPA of not scrutinizing its own actions as closely it would a similar incident caused by private enterprise.
An unprecedented collection of stakeholders across 11 states is working to save the bird’s population before the federal government steps in.
In Colorado, 36 species of flora and fauna are listed under the Endangered Species Act.
The Gunnison sage grouse was listed as threatened last November. That experience may offer some lessons about the greater sage grouse.
Enos Mills led the campaign for the park's founding. Historical actor John Stansfield recalls Mills' story -- in character.
It's not just recent wildfire smoke that's caused dozens of air pollutant advisories so far this year.
Workers were delayed in issuing a warning about the spill because they were trying to escape it, documents say.
An agency report also found that "underestimation of the water pressure" in the mine was likely the most significant factor relating to the blowout.
It's a reversal for local officials who long feared that designation as a federal Superfund site would harm economic development.
Colorado must reduce its carbon emissions levels by 40 percent. It's well on its way.
A 2013 report says taxpayers should be getting more money from federal coal extraction fees. Local governments say changing the fees will cripple the industry.
Lawmakers passed a bill in 2013 allowing for graywater use in Colorado, but the practice has gone virtually nowhere.
While the EPA and its contractors triggered the Gold King blowout, the agency is far from the only party responsible for the accident.