In one of the few places on Earth where people can rarely be found, the human race has well and truly made its mark. In the middle of the Pacific Ocean lies a floating garbage patch twice the size of Britain. A place where the water is filled with six times as much plastic as plankton. This plastic-plankton soup is entering the food chain and heading for your dinner table.-- from The plastic killing fields.
See also Even Tiny Plastic Pieces Can Carry Pollution Throughout the Oceans.