1. USDA Forest Service Northern Research Station in Amherst , Massachusetts, United States
2. School of Geographical Sciences and Urban Planning and the School of Sustainability, Arizona State University , Tempe, Arizona , United States
3. Vermont Center for Ecostudies , Norwich, Vermont , United States
4. Northumbria University , Newcastle upon Tyne, England, United Kingdom
5. McCourt School of Public Policy, Georgetown University , Washington , DC, United States