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For a long time now the renewable power of water has been harnessed for a wide variety of hydraulic applications, in all parts of the world, and it is currently the most common source of renewable energy (RES) for the production of electricity. In Greece , hydroelectric power stations produced 3,693 gigawatts/hour of electricity in 2000, compared with a total of 4,145 gigawatts/hour from RESs as a whole (including biomass, wind energy, solar power stations, photovoltaic solar arrays, geothermal energy, etc). Most of this hydroelectric power is generated by large power stations.
