A district court remanded back to state court Massachusetts' consumer protection lawsuit concerning an oil company's accounting of climate change risks. The state argued that the company misled and deceived its investors and consumers about the climate risks of fossil fuel products, and moved to rem...

The Ninth Circuit affirmed in part and reversed in part a district court's dismissal of a suit challenging an automobile company's use of diesel-cheat devices to evade compliance with federally mandated emission standards. Two counties argued the company's installation of and modification to the dev...

The Fifth Circuit upheld EPA's decision to reject a challenge to a CAA Title V permit it issued for expansion of a plant in Baytown, Texas. Environmental groups requested that EPA reject the permit on the grounds that the underlying Title I preconstruction permit allowing the expansion was invalid. ...

The First Circuit vacated an air permit issued by the Massachusetts Department of Environmental Protection (MDEP) for a proposed natural gas compressor station that is part of a natural gas pipeline connecting the northeastern U.S. and Canada. Nearby municipalities and citizens argued that MDEP impr...

The Ninth Circuit affirmed in part a district court ruling granting California counties' and cities' motions to remand to state court a lawsuit against oil companies alleging nuisance and other causes of action arising from the role of fossil fuel products in global warming. The companies argued the...

The Ninth Circuit vacated and remanded a district court ruling denying San Francisco's and Oakland's motion to remand to state court a lawsuit alleging that oil companies make and sell products that create a public nuisance—sea-level rise—when combusted. The cities argued the district court erre...