Global warming - impact of climate change on global agriculture Of the seven major regions with a high or moderate suitability index (Figure 1), we can see that: 1) The central U.S. will likely experience a modest decrease, particularly in the Great Plains, 2) Mexico and Central America will likely experience a significant decrease. This decline in precipitation is a feature of all global climate models. Because of the magnitude of this impact on our neighbors to the south, our U.S. national policy makers should monitor climate change over this region through the coming years. 3) Brazil, Uruguay, and Argentina might see an increase in rainfall that likely will be beneficial, 4) Southern and eastern Europe likely will see a substantial decrease, 5) Central Africa likely will see an increase and southern Africa a decrease, 6) India probably will experience an increase. 7) China and East Asia will probably experience an increase. However, the likelihood of extreme increases in precipitation in these areas may be detrimental to agricultural production. 8) Australia is projected to see an increase in the east and a decrease in the west. Regions with a long history of cereal production, such as Australia, are already facing new challenges (Reuters, 2008). Six continuous years of drought have reduced Australias rice crop by 98 percent and has shut down processing plants (Bradsher, 2008).