; (B) reduced export markets; (C) growing, but still limited, domestic end markets; and (D) an ever-changing and heterogeneous supply stream; (4) in some areas, recycling and composting infrastructure is in need of revitalization; and (5) in an effort to address those challenges, the United States must use a combination of tactics to improve recycling and composting in the United States. 4. Report on composting infrastructure capabilities The Administrator, in consultation with States, units of local government, and Indian Tribes, shall— (1) prepare a report, or expand work under the National Recycling Strategy to include data, describing the capability of the United States to implement a national composting strategy for compostable materials for the purposes of reducing contamination rates for recycling, including— (A) an evaluation of existing Federal, State, and local laws that may present barriers to implementation of a national composting strategy; (B) (i) an evaluation of existing composting programs of States, units of local government, and Indian Tribes; and (ii) a description of best practices based on those programs; (C) an evaluation of existing composting infrastructure in States, units of local government, and Indian Tribes for the purposes of estimating cost and approximate land needed to expand composting programs; and (D) a study of the practices of manufacturers and companies that are moving to using compostable packaging and food service ware for the purpose of making the composting process the end-of-life use of those products