The U.S. Supreme Court denied DTE’s petition to review an environmental penalty against one its coal plants over increased emissions.

ISO-NE will revise the scope of its 2027 transmission needs assessments after stakeholders raised questions about the study’s dispatch modeling.

Now that EPA has reversed its position on the Clean Power Plan, some supporters of the program say the D.C. Circuit should rule on the issue.

EPA will repeal the Clean Power Plan, saying the Obama administration’s switch to more natural gas and renewable generation exceeded the agency’s authority.

Hopes for overturning EPA's Clean Power Plan (CPP) appear to hinge on whether the agency overstepped its authority in relying on "generation shifting."

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.

The Mercury and Air Toxics Standards at issue before the Supreme Court are the result of a quarter century of legislation, regulation and litigation.

A top EPA official told state regulators the agency is still in listening mode in drafting its greenhouse gas rules on existing power plants. Others expressed concerns.

Briefs from federal agencies governing PJM Interconnection and other national organizations. This week's news include stories from the EIA, EPA, FERC, NERC, Congress, and other national news.