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Published online 27 August 2004 | Nature | doi:10.1038/news040823-16
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Cars get a cleaner start
A solid sponge could reduce pollution from vehicles.
A crystal with a structure resembling Swiss cheese has been developed to dramatically clean up exhaust emissions by trapping pollutants for the few minutes after the engine has been started.
Hydrocarbon emission from vehicles is a serious problem: the chemicals react with other pollutants in the air to form smog and ozone, which can induce asthma and breathing problems.
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