Signage made up of individual faces is displayed inside the Facebook Inc. Prineville Data Center in Prineville, Oregon, U.S., on Monday, April 28, 2014. The Facebook Prineville Data Center features leading energy-efficient technology, including features such as rainwater reclamation, a solar energy installation for providing electricity to the office areas and reuse of heat created by the servers to heat office space. Photographer: Meg Roussos/Bloomberg via Getty Images