Figure 1
From: Microplastics in freshwater ecosystems: what we know and what we need to know
Microplastics in sediments from the rivers Elbe (A), Mosel (B), Neckar (C), and Rhine (D). Note the diverse shapes (filaments, fragments, and spheres) and that not all items are microplastics (e.g., aluminum foil (C) and glass spheres and sand (D), white arrowheads). The white bars represent 1 mm.