Hydropower plants generate electricity by using the energy of flowing water. They typically harness the power of rivers or dams, where water is stored in a reservoir. When released, the water flows through turbines, causing them to spin and generate electricity. This process is efficient and produces renewable energy, making it an important part of the global energy mix. These plants can vary in size, from large facilities that supply power to entire cities to small systems that serve individual homes. Hydropower is considered a clean energy source because it produces minimal greenhouse gas emissions compared to fossil fuels.