The Spirit Lake, Iowa, school district's electric bills soon will be blowing in the wind. By the middle of next year, the district plans to have its electricity supplied entirely by two wind-energy generators.

The district installed one 240-kilowatt wind turbine in 1993 to power the elementary school, with enough electricity left over for 188 homes. Officials are adding a second, larger generator next year.

Superintendent Harold Overman said the first turbine already has paid for itself, and he said the power savings over the next five years would be enough to equip a computer lab.

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