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Norway ’ s Green Mountain operates a suite of three data centres which it claims are the “ world ’ s greenest ”. That ’ s thanks in part to the use of 100 % renewable hydropower , and water from the adjacent fjords in its cooling systems . The company ’ s DC1-Stavanger data centre is located in a former NATO ammunition storage facility , designed to withstand such threats as electromagnetic pulses and even a nuclear bomb blast . Its location in Norway also offers high speed connections to the UK . MARCH 2020