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March 11th, 2007
The sludgy black muck in beakers looks like something toxic brewing in Denis O'Carroll's lab. In fact, it's just the opposite.
The University of Western Ontario professor is experimenting with novel ways to clean up toxic wastes underground, where they can poison the drinking water of communities that depend on wells.
But instead of using traditional methods -- pumping old industrial waste to the surface and filtering it, for instance -- his weapon is a group of tiny pollution-filtering machines the size of molecules, from the new but fast-growing field called nanotechnology.
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