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"According to the US Navy, barnacles and biofilms can slow ships by an average of 10% due to added drag, which can add up to as much as a 40% increase in fuel consumption to counter that drag. But, an underwater robot with an adorable"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/clean-technology/underwater-robot-can-reduce-navys-fuel-consumption.html>