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. 2021 Jul 6;28:726–735. doi: 10.1016/j.spc.2021.07.001

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Fig. 1 — Casual loop diagram depicting the dynamics between oil price, plastics production and plastic waste recycling industries. RED font and arrows: exogenous variables that influence system dynamics; Dotted lines: denote uncertainty associated with the effect of the exogenous variable on the system dynamics.