With the percentage of the world’s population that lives in cities continuing to grow, School of Public Policy professor John Rennie Short published an article in The Conversation examining what cities can do to become more sustainable. In his article, Short looked at three ways to measure the environmental impact of cities: ecological, carbon, and water footprints. Short defined each measure and referenced various studies which compared data among cities. While they are an important starting point, he cautioned the three footprint measures should be analyzed in context. “These metrics are still in the early stages of development. There are lots of …