Son Of Earth Day. - Speeches and music from the teach-in on ecological concerns. This reel contains U.S. Senator Alan Cranston of CA, John Trudell San Diego, Carl Mack ast. coordinator of Afro American studies at U.C. Berkeley, Senator Edmud Muskie of Main and Dr. George Wald, Tom STokes NY Enviromnental Group and Alan Ginsberg. RECORDED: in Philadelphia, Pennsylvania, 22 Apr. 1970. BROADCAST: WBAI, 18 Aug. 1970.