Concerns about the effect of growth and development on natural resources in California's Central Valley and possible solutions to lessen the impact is the theme of an upcoming conference to be held at UC Davis Saturday, Feb. 25. "California's Great Central Valley: Balancing Growth and the Environment in the 1990s and Beyond" is the title of the annual environmental law conference this year. The UC Davis law school and the UC Davis Environmental Law Society sponsor the conference that begins at 8 a.m. in the law school. Speakers will include Gerald Haslam, author of "The Great Central Valley: California Heartland," and Felicia Marcus, regional U.S. Environmental Protection Agency administrator. Other speakers on the program include representatives from the Bureau of Reclamation, Yolo County, Caltrans, Pacific Legal Foundation and National Audubon Society. Water rights, air quality, transportation, planning, and conflicts between private property rights and public policy obligations will be among topics discussed.