Fig. 2: Distribution of polymer types, morphotypes, and sizes for MPs in Beijing.

a Chord diagram of MPs shape and size types of different polymer types. b The proportion of polymer types (PE, PP, PS, PET, PA, EVA, PMMA and PVC), morphotypes (fragment, fiber and film), and sizes (<100, 100–300, 300−1000 and 1000–5000 μm) in different water bodies in Beijing.