Three University of New South Wales students have developed the Rockpool, a waterless dishwasher, and it's such a success that it will be Australia's entry in the Electrolux Design Laboratory competition to be held in New York. The dishwasher uses "supercritical carbon dioxide" to create a fluid that acts as a powerful grease-cutter and solvent without the use of any water. The technology isn't brand-new—it's been used in industrial cleaning applications for years—but this is the first time the technology has been used for consumer purposes. Hopefully, this means installations won't be dependent on nearby plumbing. But, carbon dioxide? Will using carbon dioxide leave dishes smelling lemony fresh or more like that bad-breath smell that fizzes up from soda?