statistics from the US Environmental Protection Agency (EPA) specify that approximately 23.7% of material in recyclable streams is plastic , and over 80% of these plastics includes plastic types #3 -#7 and other lower-value types such as non-bottle PET and HDPE plastics (#1 -#2) . We apply these estimates to determine rates of recyclable material production across the continental US: for each county, total population is used to determine annual recyclable production, which is localized to its county node. The production of recyclable wastes is distributed across the US as in Figure , with higher production density linked to dense urban centers. See the SI for further comments and data regarding US plastic waste availability. & for more details). Feedstock recyclables, plastic bales, plastic flake, and pyrolysis oil are allowed to be transported around the US by choosing realistic transportation costs, while the remaining (e.g., ethylene and propylene gas) involve high transportation costs (e.g., pipelines) that make transport infeasible (they need to be consumed on-site). These transportation restrictions are captured by the model. The techno-economic specifications of each component of upcycling are adapted from Ma et al. (which focused on the US Midwest region). See the SI for details on technologies and for further details on process yield factors, capital costs, and operating costs.