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Solar energy systems are the cleanest power-generating technologies available on the market today. Their impact on the environment is minimal producing no air pollution, hazardous waste, or noise. A future away from fossil fuels, a finite resource, is possible with the conversion of the sun's rays into sources of energy. Solar energy on a large scale can be a formative economic driver, in 2007 the U.S. PV market increased by 57% to 220 MW.