Environmental issues emerging from the development of California's Central Valley will be the topic of a daylong environmental law conference Saturday, Feb. 7, at the UC Davis law school. Four panels will explore the impact of development on air, land, water and habitat in what is one of the world's richest agricultural areas, and possible solutions. Carol Whiteside, president of the Great Valley Center in Modesto, will deliver a keynote speech entitled "California's 21st-Century Challenge -- The Great Central Valley." David Robertson, a professor of English at UC Davis, will make a luncheon presentation, and James Quinn, a professor of environmental studies at UC Davis, will participate in the panel on habitat. Other speakers will include representatives of the Planning and Conservation League, the Sacramento Metro Air Quality Management District, the CALFED Bay-Delta Program, and the League of Women Voters Bay Delta advisory committee. The conference, sponsored by the UC Davis Environmental Law Society, will begin at 8:15 a.m. in King Hall at UC Davis. .