Clean Shipping Act of 2025

This bill establishes new standards to reduce greenhouse gas emissions from commercial shipping. It requires vessels of 400 gross tonnage or more operating on covered voyages (between U.S. ports or between U.S. and foreign ports) to use fuels with progressively lower carbon intensity, starting with a 30% reduction below 2027 baseline levels by 2034, increasing to 100% reduction by 2050. Owners must report fuel carbon intensity and emissions annually, and the EPA will set enforceable standards by specific deadlines (e.g., first standard finalized by January 2029). Vessels on short voyages (30 days or fewer annually) are exempt, and standards may be adjusted if technological or economic feasibility is challenged.