I misremembered - it's 10 rivers, 8 of which are in Asia: https://pubs.acs.org/doi/10.1021/acs.est.7b02368 https://pubs.acs.org/doi/10.1021/acs.est.7b02368 Sum

I misremembered - it's 10 rivers, 8 of which are in Asia: https://pubs.acs.org/doi/10.1021/acs.est.7b02368 https://pubs.acs.org/doi/10.1021/acs.est.7b02368 Summarised in this article: https://www.weforum.org/agenda/2018/06/90-of-plastic-polluting-our-oceans-comes-from-just-10-rivers/ https://www.weforum.org/agenda/2018/06/90-of-plastic-polluti...