An estimated 14 million metric tons of microplastics have accumulated on the seafloor, which is more than 35 times the level of plastic pollution on the surface of the world’s oceans, according to a study in Frontiers in Marine Science. The research is the first-ever global estimate of microplastics on the seafloor and was conducted using a robotic submarine to take samples of deep-sea sediments from the Great Australian Bight.
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