Ian Douglas is Emeritus Professor at the University of Manchester, with over 50 years of research experience relating to changes in the hydrologic and geomorphic systems of tropical rain forests, and to the biophysical changes in the urban environment. He is an Associate Editor of Ecological Processes, and Landscape and Urban Planning. Philip James is Professor of Ecology and leader of the Ecosystems & Environment Research Centre at the University of Salford. His research focuses on ecosystem ecology and urban ecology. He has been involved in a range of projects from creating ecological frameworks for cities and examining the ecosystem services associated with saltmarshes in urban areas to charting sustainable development in Shanghai.