Simon Bell is a professor of landscape architecture at the Estonian University of Life Sciences, Estonia, and Associate Director of the OPENspace Research Centre at the University of Edinburgh, UK.Lora E. Fleming is a professor and Chair of Epidemiology, Oceans and Human Health and Director of the European Centre for Environment and Human Health at the University of Exeter Medical School, UK.James Grellier is a research fellow at the European Centre for Environment and Human Health at the University of Exeter Medical School, UK, and a senior scientific fellow at the Institute of Psychology at the Jagiellonian University, Poland. Friedrich Kuhlmann is a chief specialist in landscape architecture at the Estonian University of Life Sciences, Estonia. Mark J. Nieuwenhuijsen is a research professor in environmental epidemiology at ISGlobal, Spain.Mathew P. White is a senior scientist in environmental psychology at the University of Vienna, Austria.