In the wake of the visit of 65 mayors to the Vatican to discuss climate change, School of Public Policy Professor John Rennie Short wrote an article for The Conversation reflecting on the central role of cities in climate change discussions. “Cities house more than half the world’s population, consume 75% of its energy and emit 80% of all greenhouse gasses. But cities are not just sources of problems; they are innovative sites for policy solutions,” wrote Short, who is an expert on urban issues and environmental concerns. In his article, he wrote that many cities are on the front lines of climate change impacts, …