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Google doodle celebrates 80th birthday. Dr. Mario Molina (1943-2020) was a Mexican-American chemist who won the Nobel Prize in Chemistry in 1995, along with Paul J. Crutzen and F. Sherwood Rowland, for their work in atmospheric chemistry, particularly for their discovery of the role of man-made chlorofluorocarbon (CFC) gases in ozone depletion. Molina was born in Mexico City and earned his undergraduate degree in chemical engineering at the National Autonomous University of Mexico before completing his Ph.D. at the University of California, Berkeley. He went on to work at the Jet Propulsion Laboratory in California before joining the faculty at the Massachusetts Institute of Technology (MIT) in 1989. Molina's research focused on the chemistry of the atmosphere and the environmental impact of human activity. His work on the effects of CFCs on the ozone layer led to the signing of the Montreal Protocol in 1987, which called for a reduction in the production and use of these chemicals...