How do you "one up" Al Gore? Today's introductory plenary from former President Bill Clinton at Greenbuild in Chicago was both inspiring and sobering. His candid demeanor and challenging comments were an embodiment of the social attribute of sustainable design. Additionally he emphasized the economic opportunity in our present environmental challenges and encouraged attendees to create green building models that can be replicated in emerging economies. Regardless of your politics, his message was sound: the green collar economy is key to sustaining and replenishing our future.