Geothermal energy—the heat beneath our feet—has the potential to “transform the U.S. energy landscape,” according to the U.S. Department of Energy. But there are challenges along the way. Credit: Quaise Energy
“Recovery of just 2% of the thermal energy stored in hot rock 3 to 10 km below the continental U.S. is equivalent to 2,000 times the primary U.S. energy consumption” annually, he and Callahan write in their paper. Researchers around the world are working on engineered geothermal systems , essentially underground radiators or heat exchangers, that aim to do just that.
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