In The Very Hungry City. Austin Troy ’95 explains how cities with a high “urban energy metabolism”—that is, the need for a lot of energy to function—is at a competitive disadvantage. He looked at dozens of cities and suburbs in Europe and the United States—from Los Angeles to Copenhagen—to understand the diverse factors that affect their energy use. He then assessed some of the most imaginative solutions that cities have proposed, among them green building, energy-efficient neighborhoods, symbiotic infrastructure, congestion pricing, transit-oriented development and water conservation. The book is published by Yale University Press.