Geothermal Energy: Harnessing the Heat Beneath Your Feet
b'Right below your feet is a source of renewable energy that is largely untapped. It heats groundwater by conduction and convection as it travels toward the surface of the earth. Lawrence Livermore National Lab scientists Carol Bruton and John Ziagos explain how geothermal energy can be used to generate electricity or heat buildings. Series: "Lawrence Livermore National Lab Science on Saturday" [Science] [Show ID: 15238]'