Geothermal – Energy by the earth
Geothermal energy is the heat from the Earth. The heat is stored in the upper layers of the earth’s crust; you can use it to heat up buildings or to produce electricity.
The best is, that it is available permanently, so you can use the heat and produce electricity all the time. A geothermal power plant converts heat into electricity using the steam turbine technology, like a conventional power plant.
Instead of burning fossil fuel to boil the water for the steam turbine, the water is led in pipes through an underground heat reservoir and heated up by the natural heat of the earth. The produced steam spins the steam turbine and the cooled water is led back through the heat reservoir, so the cycle closes.