An architect’s drawing of Facebook’s new server farm in Lulea, Sweden. The plant on the edge of the Arctic Circle is Facebook’s first outside the US and is aimed at improving the performance for European users of the social networking site. Facebook confirmed it had picked the northern Swedish city of Lulea for the data centre partly because of the cold climate, which is crucial for keeping the servers cool, and the access to renewable energy from nearby hydropower facilities. (EPA/SWECO/THE NODE POLE)