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Published on Sep 3, 2014
Watch the full-length episode at http://video.pbs.org/video/2365347150... (US Only) www.pbs.org/howwegottonow HOW WE GOT TO NOW WITH STEVEN JOHNSON airs Wednesdays, October 15, 9/8c and October 22-November 12, 10/9c. From raising an entire city, to deliberately “poisoning” water supplies, discover how we've managed to rid many cities of filth and disease, and learn why the iPhone, the subway, and even the bikini are the result of the valiant efforts of the unsung heroes of clean.