The D.C. Circuit denied states' and industry groups' petitions challenging EPA rules establishing CAA permitting requirements in states that do not have implementation plans for…

A California appellate court held that the California Air Resources Board (CARB) violated the California APA and the California Environmental Quality Act (CEQA) when it adopted its Low Carbon Fuel…

The D.C. Circuit vacated an EPA rule that deferred regulation of biogenic carbon dioxide—non-fossil-fuel carbon dioxide sources such as ethanol—for three years. Although the "Deferral Rule…

A district court dismissed environmental groups' claims that BLM failed to adequately consider climate change, global warming, and greenhouse gases (GHGs) in violation of NEPA before it…

The U.S. Supreme Court struck down portions of the Los Angeles port's "Clean Truck Program," which was designed in part to reduce emissions related to port operations, including…

A district court denied a motion to reconsider its earlier dismissal of a lawsuit seeking declaratory and injunctive relief based on the federal government's alleged failure to reduce…

The Fifth Circuit affirmed a lower court decision that the doctrine of res judicata bars individuals' trespass, nuisance, and negligence claims against numerous oil, coal, electric, and…

An Iowa appellate court affirmed the dismissal of a minor's petition asking the Iowa Department of Natural Resources to adopt new rules regarding the emission of greenhouse gases in the state…

A California court rejected a challenge to the emissions offset component of California's greenhouse gas (GHG) cap-and-trade program promulgated by the California Air Resources Board (CARB)…

The D.C. Circuit denied a petition for rehearing of an earlier decision in which it upheld four EPA rulemakings governing greenhouse gases. EPA issued the rules following the U.S. Supreme Court…