Hydroelectric power is a form of renewable energy that generates electricity by using the flow of water. Typically, water from rivers or dams is directed through turbines, which spin and produce electricity. This process harnesses the kinetic energy of moving water, making it a clean and sustainable energy source. Hydroelectric power plants can vary in size, from large facilities that supply power to entire cities to smaller systems that serve local communities. This energy source helps reduce reliance on fossil fuels and lowers greenhouse gas emissions, contributing to a more sustainable future.