Adaptation has become part of the discourse of global warming and is now widely recognized as a fundamental and necessary response to the threat posed by the climatic changes that will occur, or are already occurring due to past and present carbon emissions. A new statistical analysis has estimated the global-scale net effect to climate change on crop yields for the world’s six most widely grown crops. According to this study, “the historical temperature-yield relationships indicate that at the global scale, warming from 1981-2002 very likely offset some of the yield gains for wheat, maize and barley. Most countries in Africa that is highly dependent on agricultural commodities are facing the adverse impacts of climate change both in terms of food security and human security.