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This startup turns hills into giant batteries
www.fastcompany.com

This startup turns hills into giant batteries

You don’t need a lot of lithium when you have gravity.
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Bill Gates-backed Heliogen brings solar energy to industry

Bill Gates-backed Heliogen brings solar energy to industry

Using mirrors to concentrate solar power isn’t new, but now the tech can push temperatures high enough to be used for manufacturing things such as steel and cement.
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