BBC Earth

Episode 1 – Clean

Preview

Dirty water has killed more humans than all the wars of history combined, but in the last 150 years a series of radical ideas, extraordinary innovations and unsung heroes have changed our world and the very way we live our lives.

This isn’t just about the world becoming a cleaner place. The iPhone, the subway, flat-screen TVs and even the bikini are the result of the valiant efforts of the unsung heroes of Clean.