We can make progress in our efforts to control air pollution only if we establish a Federal safety code for the major pollutants. This code, establishing an adverse and a serious level for each of the significant pollutants, could be used as a guideline by communities concerned with this problem. This code should set a level for a pollutant that will protect all members of the community, the very young and the old and those most sensitive to the effects of this pollutant as well as those more able to withstand the effects of pollution.