This report considers the potential availability of land and crops for biofuel expansion in Southern Africa. It is based on a regional-level review of data and is designed to highlight regional-level opportunities and constraints. It does not attempt to concentrate on specific national-level issues (which are covered in more detail in two case studies in this series, one for Mozambique and one for Zambia); nor does it consider the multitude of social factors that might provide either opportunities for or constraints to biofuel expansion.