April 20, 2012 3:36 pm Chicago Named Most Sustainable City The Windy City gets top honors when it comes to sustainability. Karen Weigert tells us why. Local 1:19 Alerts issued as millions of birds expected to cross Illinois overnight 2:34 Forecast: Sunny Monday, but storm threat looms in coming days 1:54 An Archaeopteryx, the ‘world's most important fossil' unveiled at Chicago's Field Museum 0:19 Person dies after falling from stands at Ohio State University graduation 2:33 Monday morning weather