Fracking makes this clean energy cheaper

Drilling derrick by Georgios Kefalas

A drilling derrick is part of the energy research project Deep Heat Mining in Switzerland. A few thousand feet below Texas’ sunbaked surface, sedimentary rock and gravel are superheated to hundreds of degrees by the earth’s magma. Geothermal energy flows every minute of every day, and for decades scientists have searched for a way to …

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