3 May 2012 Updated at 18:58
Microsubmarines could clean oil spills, researchers say
A special nano-coating on the microsubmarine makes it able to effectively absorb the oil particles
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Tiny submarines that are 10 times smaller than the width of a human hair could be used to clean up oil spills, researchers have suggested.
link-
http://www.bbc.co.uk/news/technology-17940461