This line graph shows the future temperature changes predicted by various scenarios and models. The horizontal axis represents the years from 1900 to 2100. The vertical axis represents temperature change in degrees Celsius, based on the year 1990 as the having a value of zero. The axis values range from negative one to positive six. The graph shows that the increase in global annual mean temperature by 2100 could be as low as 1.4 degree or as high as 5.8 degrees.