Chicago Fights Extreme Urban Heat With Greener Ideas

Aired: 10/9/2012 | 0:10:30 | Clip
One of Chicago's most beautiful and hidden gardens is located on top of City Hall, part of an effort to 'green' roofs in order fight rising temperatures. Hari Sreenivasan reports on the actions the city of Chicago is taking to mitigate climate change in an urban landscape.