Geothermie refers to the heat that comes from the Earth's interior. This energy can be harnessed for various uses, such as heating buildings, generating electricity, and providing hot water. The heat originates from the Earth's core and is transferred to the surface through rocks and fluids. Geothermal energy is considered a renewable resource because it is continuously replenished by natural processes. It is often utilized in areas with volcanic activity or hot springs, where the Earth's heat is more accessible. This sustainable energy source helps reduce reliance on fossil fuels and lowers greenhouse gas emissions.