The Ninth Circuit reversed a previous ruling that vacated summary judgment for a California city in a RCRA citizen suit brought by an environmental group. The group had argued the city's water wells were contaminated by hexavalent chromium that was in turn transported to city residents through its w...

The Ninth Circuit affirmed, 2-1, a district court's denial of a Native American group's motion to preliminarily enjoin a land exchange and prevent copper mining on land in Arizona. The group argued the land exchange violated the Religious Freedom Restoration Act (RFRA), the Free Exercise Clause, and...

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,...

The First Circuit again affirmed a district court order that remanded to state court Rhode Island's climate change lawsuit against oil companies. The district court concluded that none of the companies' grounds for removal—federal officer, federal question, Outer Continental Shelf Lands Act, admir...

In an emergency order, the U.S. Supreme Court denied several states' application to vacate the Fifth Circuit's stay of a district court ruling that had enjoined federal agencies from implementing interim estimates on the social cost of greenhouse gas emissions.
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The Ninth Circuit affirmed summary judgment for FWS in a challenge to its 2016 Kenai Rule, which banned baiting of brown bears in the Kenai National Wildlife Refuge and hunting of coyotes, lynx, and wolves in a specific wildlife recreation area. The state of Alaska and a hunting group argued the rul...

The Ninth Circuit again affirmed a district court order that remanded to state court several California counties' and cities' lawsuit against oil and gas companies alleging state law claims arising from global warming. The district court concluded that none of the companies' grounds for removal—fe...

The Fourth Circuit affirmed a district court order that remanded to state court the city of Baltimore's climate change lawsuit against oil companies. The city alleged it sustained climate change-related injuries, including an increase in sea levels, storms, floods, heatwaves, droughts, and extreme p...

A district court denied environmental groups' motion for a temporary restraining order in a challenge to BLM's authorization of livestock grazing on pastures containing research natural areas (RNAs). The groups argued BLM's regulations required fencing to be installed to section off the RNAs so they...

The Fifth Circuit granted the Biden Administration's motion to stay a district court ruling enjoining federal agencies from implementing interim estimates on the social cost of greenhouse gas emissions. States had argued the president lacked authority to promulgate and enforce the estimates; that th...