A UC Davis physicist whose environmental work has helped clear the air in treasured places such as the Grand Canyon and a UC Davis economist whose expertise on the movement of migrant laborers across national borders has earned him invitations to assist more than 40 countries were honored recently by their campus peers for their distinguished service to the public. Physics professor Tom Cahill's research and dedication have kept him involved with air-quality problems worldwide, supplying valuable information and creating new ways to track pollution. Key to this effort has been his leadership in the design and development of a national air-pollution monitoring network at UC Davis. Economist Philip Martin's scholarship and analyses of issues surrounding immigrant labor have earned him an international reputation. Martin's key contributions have been in the areas of farm labor and international labor migration in Europe and Asia, as well as the analyses he performed on issues debated during the eight years prior to the passage of the Immigration Control and Reform Act of 1986.