This is the critical finding of a joint report by the Ocean Conservancy and the McKinsey Center for Business and Environment, Stemming the tide: Land-based strategies for a plastic-free ocean. The investigation found that more than 80 percent of ocean plastic comes from land-based sources rather than ocean-based sources such as fisheries and fishing vessels. Of that 80 percent, three-quarters comes from uncollected waste, and the remainder from leaks from within the waste-management system itself.
Read the whole article here at Mckinsey.com
Maybe we should look more seriously into some of the Ocean Cleanup Array Devices.... http://www.bbc.co.uk/news/magazine-29631332