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.

Briefs from federal agencies governing PJM Interconnection and other national organizations. This week's news include stories from the Supreme Court, the OECD, the GAO, the NRC, and other national news.

Briefs from federal agencies governing PJM Interconnection and other national organizations. This week's news include stories from the EPA, the Supreme Court, the NRC, FERC and NRECA.

Now that the EPA has issued rules limiting carbon emissions from new coal generators, the industry says carbon capture is neither feasible nor economical - at least not yet.

Electric power emissions are responsible for more than 29,000 premature deaths annually in PJM states, more than any other air pollution source, according to a new study by researchers at MIT.