The preceding parts of this case study have attempted to answer the question: what would be the impacts on Saskatchewan agriculture if the conditions represented by several climatic scenarios were experienced in the future, assuming the same technology and economic circumstances as in the 1980s? The scenarios considered included those based on an historical extreme year (HIST2), an historical 10- or 5-year period (HIST3 or HIST4), the temperature and precipitation changes implied by one of the recent climatic general circulation models (GCMs) for a doubled CO2 atmosphere (GISS1), and the temperature changes alone from that model (GISS2). The impacts were assessed by comparing results for these scenarios to results for the 1951—1980 standard climatic normal period (HIST1).