The rechargeable and storage batteries available today rely heavily on materials that could one day run out. Their cathodes are made of rare metals such as lithium or cobalt, while their anodes contain carbon sourced from oil; Plus, there are great hopes for wind as a source of renewable energy. But much of Japan is mountainous and forested, with relatively little land suitable for wind turbines. For that reason, attention has turned to the ocean.
The Brief #41 Tilting wind turbines, Carbon batteries
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