At a UN oceans summit, delegates from China, Thailand, Indonesia and the Philippines said they would work to keep plastics out of the seas. It is estimated that 5-13 million tons of plastics flow into the world's oceans annually. The Helmholtz Centre in Leipzig, Germany, estimated that 75% of land-borne marine pollution comes from just 10 rivers, predominantly in Asia. The center's study stated that a 50% reduction in plastic loads in these rivers would reduce global plastic by 37%. For the full story see http://www.bbc.com/news/science-environment-40195664.