Some projected effects of global warming and the resulting changes in global climate, based on the
extent of warming and the total atmospheric concentrations of greenhouse gases in parts per million. According
to the IPCC, a warming of 2 C° (3.6 F°) over 2005 levels is unavoidable, and an increase of at least 3 C° (5.4 F°)
is likely sometime during this century (Figure 19-B). (Data from 2007 Intergovernmental Panel on Climate Change
Report and Nicolas Stern, The Economics of Climate Change: The Stern Report, Cambridge University Press, 2006)