The Eighth Circuit affirmed a district court's dismissal of states' challenge to the Biden Administration's interim estimates on the social costs of greenhouse gas emissions. The states had sought to preliminarily enjoin federal officials, departments, and agencies from using the estimates "as bindi...

The Fifth Circuit affirmed a district court's order remanding back to state court a lawsuit brought against oil companies concerning their operations during World War II. Louisiana parishes initially filed suit in state court, arguing the companies had violated Louisiana's State and Local Coastal Re...

The D.C. Circuit dismissed for lack of standing a petition to review a 2016 EPA rule concerning greenhouse gas emissions and fuel efficiency standards for medium- and heavy-duty engines and vehicles. A coalition representing businesses that make and sell aftermarket car products challenged the rule'...

The D.C. Circuit dismissed an oil company's petition to review EPA's response concerning the decommissioning status of two oil platforms off the California coast. The company initially asked EPA for guidance on whether, as the process moves forward, the platforms would cease to qualify as regulated ...

The D.C. Circuit vacated a district court's grant of summary judgment to EPA in a challenge to the Agency's approval of a permitting program for coal ash disposal facilities in Oklahoma. Environmental groups challenged EPA’s approval on several grounds under RCRA and the APA, and the district cour...

The Iowa Supreme Court, 4-3, affirmed a summary judgment order dismissing a landowner's nuisance, trespass, and drainage claims against a neighboring confined animal feeding operation (CAFO). The neighboring CAFO moved for summary judgment based on the statutory immunity enacted in Iowa's "right-to-...

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 pollution from existing power plants. States and coal companies had petitioned for review of the plan,...

A district court granted a developer's motion to dismiss a challenge to the Army Corps of Engineers' decision to issue a CWA §404 permit for a proposed copper mine project in the Santa Rita Mountains. Environmental groups and Native American tribes argued that the Corps violated the CWA and NEPA wh...

The Tenth Circuit affirmed dismissal of a lawsuit concerning a long-running water dispute between an Indian tribe and a private landowner in Utah. The tribe sued the landowner in tribal court, arguing the landowner had been diverting the tribe's water for years. The tribal court held it had subject ...

A district court denied environmental groups' motion for partial summary judgment in a CAA citizen suit brought against a steel company concerning hydrogen sulfide and sulfur dioxide emissions at its production facilities in Pennsylvania. The groups argued the company repeatedly violated the CAA, th...