The hidden cost of the triumph of the Internet is the rise of the data center. The Net runs on huge complexes of hot, power-hungry servers that eat up real estate and energy in massive quantities — in 2006 data centers consumed a staggering 1.5% of the U.S.'s entire supply of electricity. Engineers at Google may have found a way out: the self-sufficient floating data center. According to a patent filed by Google, wind turbines and wave-powered generators will provide the electricity. Ocean water will cool the servers, which throw off huge amounts of heat. And offshore real estate is essentially free.