Geothermal power harnesses the natural heat stored beneath the Earth's surface. This process involves accessing hot water or steam reservoirs deep underground, which are then brought to the surface to drive turbines connected to an electrical generator. Different types of geothermal systems exist, including dry steam, flash steam, and binary cycle plants, which utilize lower-temperature resources through a secondary working fluid. This renewable energy source offers a consistent and reliable baseline power generation capacity, making it valuable for grid stability as it is not dependent on weather conditions.