The Fifth Circuit granted industry groups' challenge to EPA's 2024 rule that revised the equation for calculating vehicle fuel economy for purposes of the Corporate Average Fuel Economy (CAFE) standards and required manufacturers to certify fuel economy using E10 test fuel, containing 10% ethan...

The Third Circuit affirmed a district court order remanding to state court a lawsuit concerning a chemical company's design, manufacture, marketing, and sale of 1,4-dioxane. The state of New Jersey sued the company in state court, arguing its products substantially harmed the environment. The c...

The Ninth Circuit reversed a district court's dismissal of a challenge to BLM's authorization of construction on a transmission line through the San Pedro Valley. Native American tribes and environmental groups argued BLM violated the National Historic Preservation Act by issuing limited notices to ...

A district court granted New York City's motion to dismiss a challenge to its statute prohibiting the use of fossil fuels in newly constructed residential buildings. Trade groups and a union argued the statute was preempted by the Energy Policy Conservation Act (EPCA) because it concerned "the ...

The Seventh Circuit vacated a preliminary injunction that had barred enforcement of an Indiana statute giving incumbent electric companies rights of first refusal (ROFRs) to build and operate new interstate transmission facilities that connect to facilities they own. Companies seeking to b...

The D.C. Circuit partially granted petitions for rehearing in a challenge to FERC's reauthorization of two liquefied natural gas terminals and an associated pipeline in Texas. In a prior opinion, the court held FERC erred by failing to issue supplemental EISs addressing its updated environmental jus...

The Fourth Circuit vacated two district court decisions in lawsuits concerning a chemical manufacturer's role in allegedly contaminating Maryland's and South Carolina's waterways by using per- and polyfluoroalkyl substances (PFAS) in its products. The two states sued in state court, each filing two ...

The D.C. Circuit denied a petition to review FERC's authorization of an owner's request to surrender its license for a hydroelectric project on the Salmon Falls River between New Hampshire and Maine. A conservation group initially requested rehearing of the authorization, arguing the two dams from t...

The D.C. Circuit vacated certain requirements under an EPA rule concerning the assertion and treatment of confidential business information (CBI) claims for information reported to or otherwise obtained by the Agency under TSCA. Trade groups challenged the rule, arguing it allowed for unlawful discl...

A district court granted EPA's motion to dismiss a TSCA citizen suit brought by environmental groups concerning fluorination. The groups sought to compel EPA to prohibit the company's fluorination practices, which produced per- and polyfluoroalkyl substances (PFAS), a class of carcinogenic chemicals...