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The untapped trove of metals on the ocean floor might be the key to a greener future—or an environmental catastrophe.
To power the energy revolution, nations have stripped their lands for the metals crucial to build everything from Teslas to wind turbines. The hunt for cobalt has left a trail of pollution and human rights abuses in the Democratic Republic of the Congo while Zambia’s copper mining industry has poisoned nearby rivers. In nickel-rich Indonesia, mining has generated enough runoff to dye the country’s waters red.
Many countries have now set their sights on a new market: the deep ocean floor. These depths potentially hold an untapped trove of metals—nickel, cobalt, copper, and manganese—tucked into polymetallic nodules, potato-shaped deposits that are millions of years old. Mining these riches, they say, is the key to a greener future. Some are already fiddling with the lock.
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