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(a) Global plastic production since the 1950s together with an estimate of the global plastic production until 2050. (b) Estimated percentage of primary microplastics (MPs) that ends up into oceans respect the total MPs materials released into marine ecosystems every year. The percentage of land-based and marine-based contributions are also presented. (c) Most important land-based and marine-based sources of primary MPs released into marine ecosystems.
