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A crystal that traps pollution from your vehicles

Washington: University of Tokyo researchers have come up with a crystal resembling Swiss cheese that dramatically cleans up exhaust emissions by trapping pollutants a few minutes after the start of an engine. Tatsuya Okubo of the and colleagues have been investigating the problem and say that a material called SSZ-33 looks promising as a hydrocarbon trap. This substance is a zeolite: a crystal made from silicon, aluminium and oxygen that looks, at the atomic scale, like Swiss cheese.

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