Geothermal power is a renewable energy source that harnesses heat from the Earth's interior. This heat can be found in hot water and steam reservoirs beneath the surface, which can be used to generate electricity or provide direct heating. Geothermal power plants convert this thermal energy into electrical energy, making it a sustainable alternative to fossil fuels. The process involves drilling wells to access the hot water or steam, which is then brought to the surface. Once there, it can drive turbines connected to generators. Countries like Iceland and the United States are leaders in utilizing geothermal energy, showcasing its potential for reducing greenhouse gas emissions.