Thirteen essays and speeches delivered (among others) at the University of Georgia Center for Humanities and Arts (Distinguished Lecturer Series); Sixth Annual Rice University Environmental Conference; the 2000 Houston Youth Environmental Leadership Conference (Keynote address); The 1997 Conference of the North American Association for Environmental Education; Earth Day 1998, Kent State University; Student Pugwash Technologies of Peace Conference, Carnegie Mellon University, 1997; The 2000 Fleming Lecture in Religion, Southwestern University, Georgetown, Texas.