Arizona's Day in the Sun

The past year has brought a remarkable resurgence of an old idea — using mirrors to harness the heat of the sun to generate power. Such so-called concentrating solar power (CSP) plants are huge affairs, with acres and acres of mirrors and a hulking steam turbine. Pacific Gas & Electric and Florida Power & Light are among the utilities that have signed up to purchase hundreds of megawatts of solar thermal power from such plants. ( And on Feb. 22, the newest completed plant, a 64 MW facility in the Nevada desert, is being dedicated in a ceremony that includes green advocate Ed Begley, Jr., Dr. Sally Ride, and Steve Wozniak.

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