The energy obtained from hot molten rocks and hot fluid trapped inside the earth is called geothermal energy.
- Due to geological changes, molten rocks formed in the deeper hot regions of earth’s crust are pushed upward and trapped in certain regions called hot spots.
- When underground water comes in contact with the hot spot, steam is generated.
- Sometimes hot water from that region finds outlets at the surface. Such outlets are known as hot springs.
- The steam trapped in rocks is routed through a pipe to a turbine and used to generate electricity.
- Though the cost of production would not be much, but there are very few sites where such energy can be exploited.