If you’ve driven through areas where there are wind turbines you may have noticed there are times when the giant blades are not moving. Alliant Energy of Iowa spokesman, Justin Foss, says his company expects a 40 percent operating capacity for the turbines they install.
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Foss says the turbines can stop if there is not enough wind, and also have to be shut down if the wind is too strong.
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The turbines are also shut down for maintenance.
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Information from the American Wind Energy Association says Iowa generates nearly 37 percent of is electricity from wind.