The main purpose of this legislation is to extend the funding and support for certain programs run by the Environmental Protection Agency (EPA) that aim to combat plastic waste and marine debris. It specifically amends the existing Save Our Seas 2.0 Act, which focuses on addressing the issue of plastic pollution in oceans and waterways. Key provisions of the legislation include the reauthorization of EPA programs that deal with marine debris. The amendment updates a specific section of the Save Our Seas 2.0 Act by changing the expiration date of these programs from 2025 to 2030.