More than a decade after West Union, Iowa, tapped geothermal energy, the town’s heating and cooling network is a “celebrity” among clean energy advocates.

By Phil McKenna

WEST UNION, Iowa—From the billboard on the edge of town to the limestone monument on Vine Street, the signs are hard to miss: “West Union, Deeply Connected.” It’s a motto that could apply to many tight-knit farm towns across the Midwest where families date back generations.

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