Apple's datacenters are now fully supplied by renewable energy, the company has announced on its website. The company is relying mostly on a mix of solar, wind, and geothermal energy. At a facility in Maiden, North Carolina, it is also relying on fuel cells that convert biogas; the main source of energy though is a 100-acre solar farm, which became fully operational in December. The company says it has met a goal of producing 60 percent of the center's energy on-site.