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Mario Molina receives the 2013 Presidential Medal of Freedom presented by President Barack Obama in the East Room of the White House. (Photo by Leigh Vogel/WireImage)

Mario Molina: An appreciation from a colleague

By Durwood J. Zaelke | Climate Change, Special Topics

artist's rendition of Earth on fire as seen from space

Best path to net zero: Cut short-lived super-pollutants

By Mario Molina, Veerabhadran Ramanathan, Durwood J. Zaelke | Climate Change