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. 2023 Jun 5;14:3249. doi: 10.1038/s41467-023-38998-1

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Fig. 4 — a Cradle-to-factory gate system boundary of closed-loop upcycling PET via an acetolysis process based on the cut-off approach (illustrated by taking waste PET bottles as an example). b Schematic diagram of closed-loop upcycling PET via the acetolysis (decolorization not shown).