ii Summary This paper provides a review of the literature on migration, HIV/AIDS and urban food security, and attempts to draw the links between these three powerful dynamics which are at play in Southern and Eastern Africa. The aim of the paper is to stimulate discussion and provide a platform for developing an action research agenda to inform policy and programming within these three intercon...

there are different studies in urban literature on the determinants of urban growth, from the theoretical and empirical points of view. the most completed theoretical model is henderson model (1988, 1997, and 1999), which is tested by some empirical studies. as henderson model shows, the set of national product, specialization and technological progress are the determinants of urban growth. usi...

Shortage of irrigation water resources is leading to the use of domestic and industrial waste water in agriculture especially. In urban areas. Being contaminated by metals and various toxic chemicals these waste waters leads to the exposure of heavy metals and hazardous chemicals and the subsequent human health hazards through agriculture products and live stocks. Increasing cases of cancer and...