This brief describes the results of a modeling exercise to forecast the economywide impacts of expanding irrigation and increasing agricultural productivity in Sub-Saharan Africa modeled under a relatively moderate SRES (Special Report on Emission Scenario) B2 climate change scenario, which was developed by the Intergovernmental Panel on Climate Change. The results were generated using a combination of economic models capable of assessing the security implications of a variety of development pathways under climate change for the period 2000?50.