The pollution of oceans with plastic litter, discarded nylon fishing nets and eco-toxic micro-beads is well known as one of the great scourges of the modern age ― not just entangling and choking endangered, charismatic species like sea turtles, dolphins and even great whales, but attracting long-lived organic pollutants that end up permeating the entire marine food chain, right up to the fish on our plates.