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Accumulation of debris in deep sea environments. Submersible observations in Mediterranean canyons (a and b: plastic bottles at 1000 m depth at two different locations in the Marseille canyon, 43°03′00″ N, 05°00′00″ E) and above the polar circle, under ice floe (c and d: individual plastic bags, 2200–2600 m depth at Hausgarten, Fram strait, 79°03′80″ N, 04°11′60″ E).
