On June 11, 2025, the U.S. Environmental Protection Agency ("EPA") announced a proposed rule to repeal key amendments to the 2024 Mercury and Air Toxics Standards ("MATS") for coal- and oil-fired electric utility steam...more
Legal challenges filed almost immediately after President Obama announced the Clean Power Rule may be premature. That is what attorneys for EPA told the U.S. Court of Appeals for the District of Columbia Circuit recently in...more
The D.C. Circuit, by majority decision, upheld MATS, which requires coal- and oil-fired power plants to reduce emissions of mercury, arsenic, chromium, and other air pollutants. When the EPA adopted MATS in 2011, it did not...more