FIGURE 63.11 Predicted increase in global temperatures by 2100. The predictions depend on whether we expect (a) low, (b) moderate, or (c) high increases in how much CO2 the world emits during the current century. These changes in temperature are relative to the mean temperatures from 1961 to 1990.
(Data from http://www.epa.gov/climatechange/science/futuretc.html)