Geothermal storage.

Houston-based geothermal startup Sage Geosystems raised $17 million in a round led by natural gas producer Chesapeake Energy Corporation to develop an energy storage product, Canary Media reports.

Sage Geosystems touts its "battery" as a way to balance the intermittency of wind and solar and this energy storage strategy does not depend on critical minerals like other battery technologies do.

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Cat Clifford

Senior Science and Economics Correspondent