Facebook is building Europe's largest server farm near the Arctic Circle in Sweden, because the severe cold will keep the servers cool naturally - lowering the energy required to crunch data from its 800 million users.
The Lulea Data Center, in Lulea Sweden, will be just 60 miles south of the Arctic Circle. Power for the mammoth 120 megawatt server farm will be supplied by nearby hydropower plants that produce twice the electricity as the Hoover Dam!










