Hydropower is the energy that is created from water falling or flowing. There are many advantages to this type of water energy. The water plants that the energy is created in are very efficient and cost very little to run. These plants also produce very little heat therefore, sending very few harmful emissions into the environment. These plants are also much stronger than coal or nuclear plants and the dams or reservoirs that are created to provide the energy also help the surrounding areas to them by providing irrigation and preventing flooding.