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[eds]

Wind turbines have a lifespan of about 20 years, and
. . . Leeward plans to replace its current fleet,
. . . with more efficient turbines, in Wyoming.
"If the
. . . 63 turbines are removed, we would install fewer than
. . . 40 new turbines, that would be more efficient, and
, , , would generate more energy."

8-18-2018 Source:  How efficient have Wind turbines become?

[SheforACT]

Wind power capacity has increased dramatically in the U.S. recently - and accompanying that, the turbines that produce it have become more powerful, more efficient and more affordable for power producers.