Fig. 5: Main characteristics of Class I–III sub-basins.
From: River export of macro- and microplastics to seas by sources worldwide
The classes include sub-basins from different regions (see Fig. 2 and Supplementary Fig. 2). The shares of sub-basin areas are calculated relative to the total sub-basin area in each class. Descriptions of how the sewage connection, the average treatment rates, and mismanaged plastic waste for each class are calculated are provided in the “Methods” section under “Three classes for river exports of plastics”. Source: see the “Methods” for the references to the data.
