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What happens if the sun's not shining? Bright Source Energy has a solution called a distributed power tower: Mirrors focus the sun's rays on a boiler, creating steam which drives a generator. Natural gas can be used to power the plant when the sun isn't shining.
|  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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