Google builds prototype mirror for solar energy
San Francisco: Internet giant Google, has developed a prototype for a new mirror technology that could cut by half the cost of building a solar thermal plant. According to Bill Weihl, company's green energy czar if development and testing go well, he could see the product being ready in one to three years. "Things have progressed. We have an internal prototype" Weihl said in an interview, according to Reuters. 
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