Relevant article to Nature's Metropolis

Here's an article that discusses drainage issues in Chicago. I thought that this relates to Professor Tantillo's comment in class today that the entire city of Chicago was raised by five feet in the 19th century to manage runoff. In more recent history, "the city is [again] rethinking the way it paves things."

http://www.nytimes.com/2007/11/26/us/26chicago.html?scp=1&sq=Chicago%20environmental&st=cse