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Four feasible oil-spill ideas from the public

Discovery News' David Teeghman runs through four of the relatively feasible schemes suggested to combat the Gulf oil spill. You'll find one of them, the oil-blocking water filter, discussed on TechNewsDaily as well. Another high-profile idea, actor Kevin Costner's oil-sucking whirligig, was fielded by my colleague Kari Huus. If you build it, will it run?