What are the principles of geothermal energy?

The principles of geothermal energy involve utilizing the heat from the Earth's core to generate electricity or for direct heat applications. This heat can be accessed through wells drilled into geothermal reservoirs, where water is heated by the Earth's heat and brought to the surface to drive turbines and produce electricity. Geothermal energy is considered a renewable and sustainable energy source because the heat from the Earth is continuously replenished.