A state court held unconstitutional a provision of the Montana Environmental Policy Act that prohibited state agencies from considering the impacts of greenhouse gas (GHG) emissions on climate change in environmental reviews. A group of youths challenged the prohibition, arguing it was causing or co...

A district court granted the city of Charleston's motion to remand to state court its lawsuit against fossil fuel companies for allegedly contributing to climate change by producing and selling fossil fuel products while deceiving consumers and the public about the dangers associated with them. The ...

A district court granted summary judgment for the State Department in a lawsuit concerning documents related to the agency's handling of the 2016 Paris Climate Agreement. A nonprofit group filed a FOIA request, seeking three documents concerning the "Circular 175" process for the agreement. The Depa...

The Ninth Circuit dismissed for lack of standing a challenge to the Forest Service's livestock grazing decisions in Colville National Forest. Environmental groups argued the decisions would lead to an increase in wolf attacks on livestock, which in turn would cause the Washington Department of Fish ...

A district court granted a group of youths' motion for leave to file a second amended complaint in a lawsuit alleging the U.S. government failed to act on climate change and violated their right to a safe climate. The youths had argued that the government violated their constitutional rights under t...

The D.C. Circuit dismissed industry groups' petitions to review EPA's decision not to reconsider its 2009 finding that greenhouse gas (GHG) emissions from motor vehicles contribute to climate change and thus endanger public health and welfare. The groups initially petitioned EPA to reconsider its fi...

The D.C. Circuit granted oil and gas groups' petition to review a Pipeline and Hazardous Materials Safety Administration (PHMSA) safety standard that requires their members to install remote-controlled or automatic shut-off valves in some types of new or replaced gas and hazardous liquid pipelines. ...

The U.S. Supreme Court, in a splintered 5-4 decision, affirmed dismissal of a constitutional challenge to a California law that forbids in-state sale of pork meat from breeding pigs that are "confined in a cruel manner." Out-of-state pork producers challenged the law on dormant Commerce Clause groun...

The Fifth Circuit, 2-1, affirmed a district court ruling that denied the Sabine River Authority (SRA)-Louisiana's motion to dismiss a lawsuit concerning its release of water from a reservoir on the Sabine River between Texas and Louisiana. Property owners in both states argued that SRA-Louisiana and...

The Hawaii Supreme Court affirmed the Public Utility Commission's (PUC's) decision denying an energy company's request to supply energy to Hawaii Island using a biomass power plant. The company appealed, arguing the PUC misunderstood its mandate and held it to an unfair standard. The court disagreed...