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AltaRock has figured out how to use fracking to get more heat out of a geothermal well, but work remains before the energy source can dent carbon emissions.
The approach could boost U.S. lithium production—just as demand is set to soar with increased electric-vehicle usage.
An underground “heat nest” design avoids the need to fracture the rock.
DOE funds will help finance construction of a geothermal facility using advanced technology.
Carbon dioxide captured from power plants could make geothermal energy more practical.
Fluid extracts more heat out of low-temperature wells.