Geothermal Energy

Publisher Summary This chapter discusses geothermal energy as a source of energy. Geothermal energy is primarily the product of a few elements in the Earth's core which release energy as they radioactively decay. This energy is then converted to heat energy that keeps the core molten. In certain places geological forces thrust large pools of this molten rock relatively near the Earth's crust and these form the so-called geothermal “hot spots.” These hot spots occur most frequently near the junctures of the continental plates, where they are colliding or drifting apart. It is being increasingly developed in both direct heating and electricity generation around the world. Because steam and hot water cannot be piped very far without excessive energy loss, geothermal heat will have to be used locally. This restriction to local use and its limited distribution gives geothermal minor roles in the worldwide energy mix.