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The term search “engine” is apt. Searches are powered by millions of computers packed into warehouses, all wired together to function as a single system. Like any system, it obeys the laws of thermodynamics, and therefore wastes energy.
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The first law says it takes energy to do work, even if that work is only to move electrons across silicon wafers. The second law says that no engine is perfect, meaning some of the input gets lost as heat. This is the entropy, or disorder, arising from your search.
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The US Environmental Protection Agency estimates that data centres are responsible for 1.5 per cent of US energy use. How much more will that be when we, and our gadgets, are doing hundreds of searches per day? Or when the planet’s 6 billion inhabitants all want equal access? We’ve all heard the future of information architecture is cloud computing. It just might be a cloud of carbon dioxide.
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