Facebook Inc. says its Altoona  data center will be powered entirely by wind when it opens in 2015, according to DesMoinesRegister.com. The company will use its renewable energy certificates to track its energy use. It had invested in and had been working with RPM Access, a West Des Moines wind project developer,  toward that goal, but transferred development rights to MidAmerican Energy Co.'s planned new wind farm in Grundy County.