Marcie Sillman talks with Steven Johnson, author of "How We Got to Now: Six Innovations That Made the Modern World," about the technological innovations that led to widespread clean water in America, despite the E. coli in Mercer Island's drinking water this month.
Mercer Island Reminds Us Of The Miracle Of Clean Water
Flickr Photo/Teresa Boardman (CC BY-NC-ND 2.0)
