50 Hertz Electricity Grid Control Center

NEUENHAGEN BEI BERLIN, GERMANY - DECEMBER 17: A technician monitors electricity levels in front of a giant screen showing the eastern German electricity transmission grid in the control center of grid operator 50 Hertz on December 17, 2015 in Neuenhagen bei Berlin, Germany. Germany, which currently generates 30% of its power from renewable energy sources including wind and solar, has declared the ambitious goal of 80% by 2050 at the recent Paris climate talks. Expansion and adaptation of its nation-wide elctricity grid will be a crucial component of reaching that goal. (Photo by Sean Gallup/Getty Images)