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. 2015 Dec 8;5:17988. doi: 10.1038/srep17988

Figure 2. Typical microplastic categories in the Rhine.

Figure 2

Left: Duisburg sample consisting of 65% opaque spherules, further fragments and fibres, bar: 2 mm. (a/b) transparent spherules with gas bubbles, polymethyl-methacrylate (Zuilichem), bars: 1 mm; (c/d) opaque spherules, polystyrene (Duisburg, Rees), bars: 500 μm.