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Power of sun

A prototype solar device that produces enough hot air from the sun's rays to drive the turbines of a 50 kw power station has brought the prospect of cheap, solar-generated electricity a step closer. The solar energy collector has been successfully tested by Israeli researchers at the Weizmann Institute of Science, Jerusalem. Many modern power stations use hot gas to drive the turbines that produce electricity. The gas must be between 1,200 and 1,350

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