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Unknown, 2008
Current format, Unknown, 2008, , No Longer Available.
Unknown, 2008
Current format, Unknown, 2008, , No Longer Available. Offered in 0 more formats
Can you name a free, clean, and renewable energy source? The answer is blowing in the wind. Discover how the historic windmill has become today's wind turbine and learn about the prospects for wind power in the future.
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