Robert Neuwirth: The shadow cities of the future

Robert Neuwirth, author of Shadow Cities, finds the worlds squatter sites — where a billion people now make their homes — to be thriving centers of ingenuity and innovation. He takes us on a tour. TEDTalks is a daily video podcast of the best talks and performances from the TED Conference, where the world’s leading thinkers and doers are invited to give the talk of their lives in 18 minutes — including speakers such as Jill Bolte Taylor, Sir Ken Robinson, Hans Rosling, Al Gore and Arthur Benjamin. TED stands for Technology, Entertainment, and Design, and TEDTalks cover these topics as well as science, business, politics and the arts. Watch the Top 10 TEDTalks on , at