; and (B) the Roundtable on Sustainable Biomaterials; and (2) an assessment of any legal or regulatory barriers to developing a standard and certification system for circular polymers. (c) Definitions In this section: (1) Circular polymers The term circular polymers means polymers that can be reused multiple times or converted into a new, higher-quality product. (2) Mass balance methodology The term mass balance methodology means the method of chain of custody accounting designed to track the exact total amount of certain content in products or materials through the production system and to ensure an appropriate allocation of this content in the finished goods based on auditable bookkeeping. II Enhanced global engagement to combat marine debris 201. Statement of policy on international cooperation to combat marine debris It is the policy of the United States to partner, consult, and coordinate with foreign governments (at the national and subnational levels), civil society, international organizations, international financial institutions, subnational coastal communities, commercial and recreational fishing industry leaders, and the private sector, in a concerted effort— (1) to increase knowledge and raise awareness about— (A) the linkages between the sources of plastic waste, mismanaged waste, and marine debris; and (B) the upstream and downstream causes and effects of plastic waste, mismanaged waste, and marine debris on marine environments, marine wildlife, human health, and economic development; (2) to support— (A) strengthening systems for recovering, managing, reusing (to the extent practicable), and recycling plastic waste, marine debris, and microfiber pollution in the world’s oceans, emphasizing upstream waste management solutions— (i) to mitigate plastic waste at its source; and (ii) to prevent leakage of plastic waste into the environment