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Walter Scott, Jr. College of Engineering 08 Feb, 2021 Nobel Laureate Paul Crutzen. Photo credit: Carsten Costard, MPI-Chemie Science lost a brilliant researcher and the planet lost a steadfast advocate with the death of Paul Crutzen on Jan. 28. Crutzen, an atmospheric scientist, was one of the first to link human activities to ozone deterioration, leading to the worldwide ban on ozone-depleting substances. He was awarded the 1995 Nobel Prize in Chemistry, with Mario Molina and F. Sherwood Rowland, for discovering the chemical processes that cause ozone depletion. Crutzen pioneered many other significant scientific discoveries. He was the first to explore biomass burning’s impact on the atmosphere; he warned that nuclear war would lead to nuclear winter; he proved the Earth is in a new epoch influenced by humans, which he termed the Anthropocene; and he started the debate on potential geoengineering to abate the effects of greenhouse gases. ....