Geothermal energy can be found in the form of volcanoes, hot springs and geysers. Geothermal energy has three main uses: Heating, Electricity generation and Geothermal heat pumps. Geothermal energy is used since ancient times in form of hot water.Geothermal energy exploit uses three basic types of geothermal power plants: Dry steam, Flash steam and Binary power plant.eothermal energy is also widely used in the state of Nevada. Geothermal energy got its name from Greek words: geo (earth) and therme (heat), and therefore geothermal energy is in fact Earth's heat.. Geothermal energy has minimum negative environmental impact.