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Scanning Electron Microscope (SEM) images of virgin (A,B) and recycled LDPE (C,D) microplastics. SEM images reveal highly variable particle shapes. Higher resolution images of particle surfaces (B,D) indicate a possible <100 nm sized particle fraction, that in virgin LDPE are mainly associated with pits (indicated with *). Scale bar equals 500 µm (A,C) and 2 µm (B,D).
