1. Institute for Environment and Human Security (UNU-EHS), United Nations University, Bonn, Germany
2. The Global Change Institute (GCI), the University of Witwatersrand, Johannesburg, South Africa
3. Department of Geography and Environmental Studies, School of Geography Archeology and Environmental Studies, University of Witwatersrand, Johannesburg, South Africa
4. Department of Urban and Regional Planning, Obafemi Awolowo University, Ife, Nigeria