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Progress of the Federal program for control of pollutant emissions from motor vehicles is summarized, through the 1968-1980 period. The standards mandated by the Clean Air Act have now been achieved. The future will see greater emphasis on maintaining the control of emissions from passenger cars in service, as opposed to more stringent emissions standards for new cars. More emphasis will also be placed on standards for highway vehicles other than passenger cars and on control of added pollutant types, such as particulate emissions from diesel powered vehicles.