How to store power in soil and salt
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Giant towers of building blocks rising into the sky and huge vats packed with volcanic rock or molten salt are being used as massive batteries. \\n \\nThey are the latest ideas for storing energy generated by the sun and the wind \\u2013 so you can keep the lights on when it\\u2019s dark or the wind isn\\u2019t blowing. \\n \\nWe meet the entrepreneurs and scientists who are trying to harness the fundamental forces of physics to power the world.\\n \\nPresenter: Tom Colls\\n \\n \\nImage: The Energy Vault tower (c/o Energy Vault)
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