Hydropower generation is the process of producing electricity by harnessing the energy of flowing or falling water. This is typically done using a dam that creates a reservoir, where water is stored. When released, the water flows through turbines, causing them to spin and generate electricity. This renewable energy source is considered environmentally friendly because it produces no direct emissions. However, the construction of dams can impact local ecosystems and communities. Overall, hydropower is a significant contributor to the global energy supply, providing a reliable and sustainable way to generate electricity.