Hydroelectric is extracted from the movement of water. Water's kinetic energy is transferred to potential energy, and it distributed across a power line to produce electricity for many areas. A simple example of water movement producing energy is a simple wooden water wheel. The movement of water from stream or river rotates the wheel causing a kinetic energy which can then be transferred into potential energy. The faster the water is flowing, the more energy it will produce. Hydroelectricity entails the electricity being stored in electrical generators. These electrical generators are attached to massive turbine devices which spin at great speeds as a result of water rushing through them. These power station turbines are much more efficient at extracting the kinetic energy from the moving water and converting that energy it into power through these generators. While many Hydroelectric generating stations supply our world's power grids, some projects are created for private business purposes; “for example, aluminum manufacturing companies require large amounts of power. And there are many other examples of industries that use hydroelectricity in their manufacturing operations," according to The Electricity Forum.