podcast: Big Solar And Renewable Energy In The Age Of Fracking | On Point with Tom Ashbrook:
"Some of the 300,000 computer-controlled mirrors, each about 7 feet high and 10 feet wide, reflect sunlight to boilers that sit on 459-foot towers. The sun’s power is used to heat water in the boilers’ tubes and make steam, which in turn drives turbines to create electricity"
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