PUBLIC SERVICE ANNOUNCEMENT David Orr, chair of the Environmental Studies Program at Oberlin College and a leading expert on environmental policy and education, will be the guest lecturer for an "Environmental Choices" class at the University of Virginia on March 31. Orr's talk in U.Va. architecture dean William McDonough's class will be from 1-1:50 p.m. in Old Cabell Hall auditorium and is open to the public. Orr is the author of "Ecological Literacy and the Transition to a Post-Modern World" and "Earth in Mind" as well as numerous articles on environmental policy, sustainability and education. Information: (804) 924-7019. ### March 25, 1997 START DATE: Immediate KILL DATE: April 1, 1997