The main purpose of the Biobased Market Expansion Act of 2025 is to promote the use and production of biobased products in the United States. Biobased products are those made from renewable resources, such as plants and agricultural materials. This legislation aims to enhance the recognition of these products, increase their procurement by federal agencies, and boost domestic production. Key provisions of the Act include several requirements for federal agencies to prioritize the purchase of biobased products.