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In California's Mojave Desert, parabolic mirrors heat tubes of synthetic oil, which in turn produce steam to drive electricity-generating turbines in an arrangement that's known as a solar trough. Built by Luz in the 1980s, the solar plants continue to power 150,000 homes. Now solar-trough technology is drawing interest again. Acciona Solar Power has built a 64-megawatt plant in Nevada.
|  The economics -- and the technology -- of turning light into electricity have changed. We have the inside look at the industrial-strength power plants coming soon to a grid near you. (more)  Meet the companies tackling nine of humanity's biggest problems -- and making millions saving us from ourselves. (more) |
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