On March 19, 2023, Google paid tribute to Mario Molina, a Mexican-American chemist, with a Google Doodle on his 101st birthday. Molina was a Nobel laureate who made significant contributions to our understanding of the effects of human activity on the ozone layer. Mario Molina was born in Mexico City on March 19, 1923. He studied chemical engineering at the National Autonomous University of Mexico before moving to the United States to pursue his graduate studies. He received his Ph.D. in physical chemistry from the University of California, Berkeley in 1952. Molina's groundbreaking work came in the 1970s when he and his colleague F. Sherwood Rowland discovered that chlorofluorocarbons (CFCs), which were widely used in refrigeration and aerosol products, were destroying the ozone layer in the Earth's atmosphere. Their research showed that the release of these chemicals was causing a hole in the ozone layer, which would have severe consequences for human health and the environme