摘要：In general, the terrestrial transports and particu-larly automobile transport is the most important source ofgas emissions detrimental to the environment.On the one hand, the cars are responsible for mostof the CO 2 emissions in the atmosphere, thus it is impor-tant to reduce these emissions. In the other hand, the manu-facturing of cars is an industry which uses a large varietyof materials and process, and some of those constitute anecological or toxicological threat [1].
