Uncertainties in global estimates of plastic waste highlight the need for monitoring frameworks
2021
Edelson, Micaela | Håbesland, Daniel | Traldi, Rebecca
Several studies have estimated global inputs of plastic into the environment, relying on national statistics and modeling approaches. However, these estimates exhibit uncertainty driven by limited primary municipal solid waste management data. We compare mismanaged plastic estimates from three global studies (Jambeck et al. (2015), Lebreton and Andrady (2019), and Borrelle et al. (2020)), finding significant differences. Specifically, 58 countries show at least a 25 percentage point difference in estimated mismanagement rates, 27 countries show at least a 50 percentage point difference, and 9 countries show at least a 75 percentage point difference. Further, several top plastic generators exhibit large discrepancies in mismanagement estimates, including China, Russia, and Indonesia. The limitations of global plastic pollution estimates are well-known in the scientific community, and some variation is expected. However, these discrepancies limit policy design and mitigation. Thus, municipal, national, and international monitoring of plastic management and pollution must be improved.
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