The U.S. Supreme Court held, 6-3, that President Barack Obama's EPA had exceeded its statutory authority under §111(d) of the CAA when it promulgated the Clean Power Plan to address carbon dioxide…

The D.C. Circuit denied a challenge to EPA's 2015 rule updating the standards under which the Agency audits wood-burning heaters' compliance with CAA emissions limits. An industry group argued the…

The D.C. Circuit vacated EPA's Affordable Clean Energy Rule that repealed and replaced the Clean Power Plan as a means of regulating power plants' greenhouse gas emissions. A group of public…

The D.C. Circuit dismissed petitions for review challenging EPA's anticipated rule restricting carbon dioxide (CO2) emissions from existing power plants. On June 18, 2014, EPA proposed a rule to…

The D.C. Circuit reversed and vacated a portion of a January 2013 rule in which EPA revised the NESHAPs and new source performance standards for backup generators. Specifically, the court held…

A district court dismissed Nebraska's lawsuit challenging EPA's proposed standards to limit carbon dioxide emissions from new or modified fossil fuel-fired electric utility generating units. As…

The D.C. Circuit denied an electric utility association's petition for review challenging EPA's new source performance standards for steam generating units. The standards—issued via final rules in…

A district court rejected a group of mid-Atlantic states' claims that projects undertaken by an energy company at three of its coal-fired power plants in Pennsylvania violated the CAA's prevention…

A district court dismissed Native American and environmental groups' CAA citizen suit asking the court to order EPA to issue a final rule that establishes best available retrofit technology (BART…

The D.C. Circuit denied medical waste trade associations' petition for…