David S. G. Thomas is a scientist and geographer. He was born in Dover, Kent, UK in 1958. He is Professor of Geography at the University of Oxford, and a Professorial Fellow of Hertford College, Oxford. The University of Oxford (informally "Oxford University" or simply "Oxford" located in the city of Oxford, Oxfordshire, England is the Hertford College is one of the constituent colleges of the University of Oxford in England. His research deals with desertification, dryland environments, climate change and other environmental phenomena. Desertification is the degradation of land in arid and dry sub-humid areas resulting primarily from human activities and influenced by climatic variations See also Nature The natural environment, commonly referred to simply as the environment, is a terminology that is comprised of all living and Climate change is any long-term significant change in the “average weather” that a given region experiences He received his DPhil from the University of Oxford. The University of Oxford (informally "Oxford University" or simply "Oxford" located in the city of Oxford, Oxfordshire, England is the Between 1984 and 1998 he taught at the University of Sheffield. The University of Sheffield is a research University, located in Sheffield in South Yorkshire, England.