A potential energy source that is more than just hot air
They look like something out of The Empire Strikes Back. But the futuristic-appearing contraptions that are beginning to sprout atop remote and windy mountain ridges, and even right in the middle of congested suburban developments, are really nothing more than updated versions of the first reported windmill, which was built to capture the power of Persian breezes in the 7th century.
As the rocketing cost of petroleum pushes electrical utility rates further and further into orbit, "windmill power" is becoming a good bet....
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