 In this Nov. 5, 2019, photo, workers maneuver an old turbine hub being lowered to the ground in Walnut. MidAmerican Energys wind farm in Walnut was repowering turbines, some of which had their original blades since 2004. Blades can weigh up to 11,500 pounds. Olivia SunDes Moines Register via AP A rotor assembly is moved ... Is Iowas newest turbine blade recycling method eco-friendly?... 