By 
Ryan Gravel
 | 
TED Stage Talk

How an old loop of railroads is changing the face of a city

Urban planner Ryan Gravel shares the story of how his hometown of Atlanta, Georgia, rallied to build a massive urban park that will transform an abandoned railroad track into 22 miles of public green space called the Atlanta BeltLine. The places we live aren't inevitable, he says -- and if we want something different, we need to speak up.

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