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. But in this town of 2,500, the words have … Continue reading This Town Was One of the First in the Nation to Install a Geothermal Network. Now Others Are Warming Up to the Idea.