Mario Molina has been selected to receive the Presidential Medal of Freedom, the White House announced on 8 August. Molina, who was a recipient of the Nobel Prize in Chemistry in 1995 for discovering how chlorofluorocarbons deplete the ozone layer, is a professor at the University of California, San Diego; director of the Mario Molina Center for Energy and Environment in Mexico City, Mexico; and a member of the President's Council of Advisors on Science and Technology.