Most of the world’s population now lives in cities. How can we make sure these urban centers are good homes for humanity? Cities from Bogotá and Rio de Janeiro to Seoul are leading the way, using fresh ideas to reduce pollution and waste; provide efficient, clean transportation; and support biodiversity.

Most of the world’s population now lives in cities. How can we make sure these urban centers are good homes for humanity? Cities from Bogotá and Rio de Janeiro to Seoul are leading the way, using fresh ideas to reduce pollution and waste; provide efficient, clean transportation; and support biodiversity.

Most of the world’s population now lives in cities. How can we make sure these urban centers are good homes for humanity? Cities from Bogotá and Rio de Janeiro to Seoul are leading the way, using fresh ideas to reduce pollution and waste; provide efficient, clean transportation; and support biodiversity.

Most of the world’s population now lives in cities. How can we make sure these urban centers are good homes for humanity? Cities from Bogotá and Rio de Janeiro to Seoul are leading the way, using fresh ideas to reduce pollution and waste; provide efficient, clean transportation; and support biodiversity.