Detroit Free Press: Up close, they look like tall, graceful dancers doing cartwheels over muddy fields and barns. They mesmerize, their slowly turning blades glinting bright white in the late afternoon sun. "People come all the time and just stop and look at them," said farmer Bob Krohn of the three wind turbines on his land. Harvest Wind Farm’s 32 wind turbines near this small Thumb town have proven popular so far, adding $22 million in taxable value to Oliver Township’s tax base and …