| Date |
Speaker |
| Spring 2010 |
Fritz Haeg,
artist, architect, gardener and educator |
| Fall 2009 |
Fabien Cousteau,
aquatic filmmaker and oceanographic explorer, son of Jean-Michel Cousteau
and grandson of Jacques-Yves Cousteau |
| Fall 2008 |
Doug Phillips, creator, producer and host of Alabama Public Television's award-winning and Emmy-nominated Discovering Alabama |
| Spring 2008 |
David Lambert, nationally recognized advocate to end hunger |
| Fall 2006 |
James T. Morris, executive director of the United Nations World Food Programme |
| Fall 2005 |
Catherine A. Bertini, former executive director of the United Nations World Food Programme and recipient of the 2003 World Food Prize |
| Winter 2005 |
James E. Horne, nationally recognized sustainable farming advocate |
| Winter 2004 |
Norman Borlaug, 1970 Nobel Peace Prize winner, known as the father of Green Revolution |
| Fall 2003 |
Joe Lewis, USDA research entomologist internationally recognized for his groundbreaking work in ecologically based pest management, and Beth Lewis, veteran educator who focuses on fostering community-based schools |
| Spring 2003 |
Frederick Kirschenmann, director of the Iowa State University-based Leopold Center for Sustainable Agriculture |