The Tyler Prize for Environmental Achievement is one of the premier awards honoring triumphs in environmental science, energy and medicine of worldwide importance.   Administered by USC, the Tyler Prize consists of a cash award of $200,000 and a solid 10kt. gold medallion. On April 8, 2005, Charles David Keeling, professor of oceanography at the Scripps Institution of Oceanography at the University of California, San Diego, and Lonnie G. Thompson, University Professor of Geology at Ohio State University were conferred as Tyler Laureates.