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In Part I of this paper, we examine the history of mobile source air pollution control—particularly, control of undesirable emissions from automotive vehicles. It is concluded that the choice of the level of control required of the automotive vehicle in the mid 1970's was arbitrary and not in the best interest of the public. The costs will outweigh the benefits, especially when one considers the health effects of various pollutants and relative contribution of the more noxious air pollution constituents from other sources.
In Part II we examine how we arrived at this state of affairs and address the major questions that have not yet been resolved.