Deep sea mining is the practice of removing metals and minerals from the ocean’s seabed. Thousands of metres below the surface, deposits of these metals and minerals like manganese, nickel and cobalt have built up on the seafloor into potato-sized nodules over millions of years. To mine these metals, gigantic machines weighing more than a blue whale would scoop deposits from the deep ocean floor. They’d then pump the mined material up to a ship through up to several kilometres of tubing. Sand, seawater and other mineral waste would then be pumped back into the water.
Deep sea mining is a very new industry. Apart from a few small tests, no commercial mining has happened yet. But the companies involved are preparing to start full-scale production.
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