Hydropower is a renewable energy source that harnesses the energy of flowing water to generate electricity. It is one of the oldest and most widely used forms of energy production, utilizing the gravitational force of falling or flowing water to turn turbines, which then convert kinetic energy into electrical energy. This clean energy source plays a crucial role in reducing greenhouse gas emissions and combating climate change. Major hydropower facilities, such as the Three Gorges Dam in China, demonstrate the potential of hydropower to provide large-scale electricity while also offering benefits like flood control and water supply management.