Geothermal energy is energy obtained from the heat that comes from inside the Earth. Due to high temperatures, magmatic intrusions and other places with volcanic activity are areas with high geothermal potential.
This type of energy can be used in thermal power stations, through a turbine whose blades are driven by water vapor produced by the heat of the Earth. This rotational motion is transmitted to the shaft of generators producing electricity.
In Portugal, in the Autonomous Region of the Azores, there are units for the production of electricity using geothermal energy. In addition to being used to produce electricity, geothermal energy is also used as a source of heat for greenhouses or heat pumps, for spas or industry, and for heating or cooling buildings.