06/04/2009 05:12 am ET Updated May 25, 2011

Green-Leaning Mayors: Newsom, Daley, Bloomberg And More

Climate change is a global problem--but as of yet, there's no global solution. That's why mayors across the U.S. are taking action, from building green to organizing bike rides, from redeveloping downtowns to cutting emissions. Here are just a few of the municipal leaders who have worked to take our collective future into their own hands.

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