Marine litter is human-created waste that has been discharged into the marine environment, including glass, metal, plastics, and other debris. According to data compiled by the United Nations, the equivalent of a garbage truck filled with plastic is dumped into the ocean every minute—more than 8 million metric tons per year. On November 11, 2019, the Environmental Law Institute hosted an expert panel that explored recent U.S. legislation to target marine litter, the economic impacts of marine litter, and examples of successful international marine pollution agreements and regulatory collaborations. This Dialogue presents a transcript of the discussion, which has been edited for style, clarity, and space considerations.