Geothermal energy is

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    a heating system that uses hot-water pipes embedded in flooring within a home.
     the use of naturally heated water or steam to heat buildings or drive turbogenerators.
     heat derived from the crushing of large quantities of rock.
     heat derived from molten lava.
asked Jun 25, 2012 in Environmental Science by anonymous
    

1 Answer

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the use of naturally heated water or steam to heat buildings or drive turbogenerators.
answered Jun 26, 2012 by Geodude ~Top Expert~ (9,680 points)

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