The inherent technical, economic and environmental benefits of hydroelectric power make it an important contributor to the future world energy mix, particularly in the developing countries. These countries have a great and ever-intensifying need for power and water supplies and they also have the greatest remaining water potential. Hydropower is the largest source of renewable energy. It is considered as renewable because it draws its essential energy from the sun, which drives the hydrological cycle. This, in turn, provides a continuous renewable water supply. Hydropower represents more than 92 percent of all renewable energy generated, and continues to stand as one of the most viable sources of new generation into the future. It also provides an option to store energy and to optimize electricity generation.
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