EPA's final Clean Power Plan provoked outrage from coal interests, praise from environmentalists and cautious optimism from regulators and grid operators.

EPA's final Clean Power Plan relaxes some controversial proposals while increasing its target for carbon emission reductions.

SPP's latest analysis of EPA’s draft Clean Power Plan indicates state-by-state compliance with the plan would result in nearly 40% higher costs than a regional approach.

“My guess is EPA is going to largely ignore the problem and hope that nuclear plants don’t retire,” an Exelon executive said.

The Supreme Court ruled that EPA acted “unreasonably” when it failed to consider costs before deciding to regulate mercury and other toxic emissions from power plants under the Clean Air Act.

A top EPA official gave the most detailed hints yet about how the agency will revise the Clean Power Plan when the final rule is released this summer.

This week's FERC and federal briefs include news on the Environmental Protection Agency, the Nuclear Regulatory Commission and the NTSB.

Since the EPA proposed its Clean Power Plan, the idea that the final rule should include a reliability safety valve has become an article of faith among utility, state and RTO officials.

Arkansas PSC Chairman Ted Thomas is no fan of the EPA’s Clean Power Plan, but he’s perhaps even more critical of congressional Republicans.

A federal appeals court Friday threw out the 2013 EPA rule exempting diesel generators providing demand response from air emissions limits.