To create a sustainable enviroment where water systems are functional and accessible for everyone we must conserve out water. Water is important because it supplies us with energy, a source of power called 'hydroelectricity', the process is The hydroelectric in the power plant's dam is controlled by a gate or valve, an outlet or place where the water ends up after flowing downward. Water has potential energy just before it spills over the top of a dam. As water flows downhill, the potential energy is converted into energy. The water can be used to turn the blades of a turbine to generate electricity.