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GRID-Arendal own calculations, each source is indicated in the notes 1 Calculated as 1.4% of all the plastics produced since the 1950s. From Jang et al., 2015 2 Lebreton et al., 2012 3 Assuming 66% of the plastic is buoyant. From Jambeck et al., 2015 4 From Cózar et al., 2014; Eriksen et al., 2014; van Sebille, 2015