This storyoriginally appeared on CityLaband is part of theClimate Deskcollaboration. Over the years, John Zimmer, the co-founder and president of Lyft, has often pointed to a class he took as an undergraduate as the source of his ideas about environmental sustainability\u2014and by extension, Lyft\u2019s goals to create greener transportation options. The class at Cornell University was called \u201cGreen Cities.