On May 15, 2026, the U.S. Court of Appeals for the Fourth Circuit partially blocked Maryland’s new “greenwashing” law for retail electricity suppliers. Holding that the statute’s core advertising restriction likely violates the First Amendment, the court ordered a preliminary injunction against the provision limiting use of terms like “clean,” “green,” and “100% renewable” if the legislature’s specified conditions were not met. In contrast, the court remanded for further proceedings on Maryland’s newly issued disclosure requirements. The decision underscores the constitutional limits on how far states can go in policing environmental marketing claims — limits that are relevant to companies both in and outside the energy sector.







