New research from CSIRO and the University of Toronto has found up to 11 million tonnes of plastic pollution on the seafloor. With plastic use expected to double by 2040, understanding how and where plastic is spread is critical to protecting marine ecosystems and wildlife. The seafloor has become the repository for most plastic pollution, with an estimated 3 to 11 million tons of plastic sinking to the bottom of the ocean. The study used data from remotely operated vehicles (ROVs) and seafloor trawls to estimate the amount and distribution of plastic on the ocean floor. Research also shows that plastic mass clusters around continents, with about half of the world's seafloor plastic mass estimated to be located above 200 meters.