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. 2017 Jun 7;8:15611. doi: 10.1038/ncomms15611

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Copyright © 2017, The Author(s)

This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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River contributions are derived from individual watershed characteristics such as population density (in inhab km⁻²), mismanaged plastic waste (MPW) production per country (in kg inhab⁻¹ d⁻¹) and monthly averaged runoff (in mm d⁻¹). The model is calibrated against river plastic concentration measurements from Europe, Asia, North and South America.