The Clean Air Act as amended Section 313 of the Clean Air Act requires the EPA Administrator to report yearly on meaures taken toward implementing the purpose and intent of the Act. This report covers the period January 1 to December 31, 1979, and describes the issues involved in the prevention and control of air pollution and the major elements of progress toward that goal that have been made since the last report. In addition, this report also includes three other EPA reports to Congress required under the Clean Air Act as amended: (1) Section 202 report on measures taken in relation to motor vehicle emission control (Chapter VI); (2) Section 306 (e) report on Federal procurement and violating racilities (in Chapter VII); and (3) Section 127 (b) report on major emitting facilities (in Chapter IV).