1. Garama 3C Ltd, Sackville Place, Norwich, NR3 1JU, United Kingdom and Climate Research Unit, School of Environmental Sciences, University of East Anglia, Norwich NR4 7TJ, United Kingdom
2. Department of Art History and World Art Studies, University of East Anglia, Norwich, NR4 7TJ, United Kingdom
3. Department of Plant Sciences, Kenyatta University, P.O. Box 43844, 00100 Nairobi, Kenya
4. Department of Geography, and Center for International Studies, Ohio University, Athens, OH 45701, United States of America