Charlie Shackleton is Professor and Head of Department in the Department of Environmental Science, Rhodes University, South Africa.Margaret Pasquini is a geographer working as a research officer at CAZS Natural Resources, Bangor University, Wales, UK. Her research interests are directed at topics which lie at the interface between agricultural systems and environmental protection. Her work has focused on vegetable production systems in urban agriculture in sub-Saharan Africa, investigating soil fertility management strategies (and particularly the use of urban waste ash), and more recently looking at the promotion, cultivation and conservation of indigenous vegetables.Axel Drescher is Professor at the Faculty of Forestry and Environmental Sciences and Coordinator of the Section on Applied Geography of the Tropics and Subtropics (APT) at the Department for Physical Geography (IPG), University of Freiburg, Germany. His entry point in the topic originates from his research work on 'Homegardens in African Spaces' 1990 - 1993 in Zambia and Zimbabwe. His major research and publication activities are in the field of Urban and Periurban Agriculture as one solution for food insecurity.