LA JOLLA, CA - May 12, 2006 - Dr. Paul Crutzen, Nobel Prize winner who worked on the interactions of atmospheric chemistry with climate, the role of halogen photochemistry with ozone in the marine boundary layer and the global modelling of atmospheric chemical processes with stratosphere and troposhere, in a lab at the University of San Diego in La Jolla, California on May 12, 2006. (Photo by Todd Bigelow/Aurora)
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