September/October 2014: Visit three North American cities pushing the envelope in sustainability: Vancouver, BC; Washington, DC; and Las Vegas, NV. Each of these three cities has a unique story to tell—about water conservation, technological innovation, and citywide green building policy—and telling those stories are mayors, planners, chief sustainability officers, architects, and corporate CEOs. Welcome to the 21st-century city.

On the Cover: The University of British Columbia’s Centre for Interactive Research on Sustainability illustrates Vancouver’s recent investment in green building hubs and environmental entrepreneurship—just one of the ways the city leads the green building movement.

Also Inside: The award-winning Zappos headquarters, Mithun’s Sustainability Treehouse, three offices by HLW, five spectacular linear parks, a profile of Chicago’s Karen Weigert, a Q&A with noted architect Ken Yeang, and much more!