This energy captures the heat energy under the Earth. Hot rocks under the ground help to heat water to produce steam. If holes are dug in this area of the ground, then the steam shoots up and is purified and used to drive turbines, which in turn gives power to electric generators.The advantages of this type of energy is that there are no harmfullby products, It is self sufficent once the geothermal plant is built, and the plants are generally small so there is no negative visual effect on the area surrounding the plant.