Now we turn to a version of the model that has three emissions scenarios from the IPCC. Again the A2 scenario is also known as "Business-as-Usual" in which we make no efforts to limit carbon emissions; the A1B scenario is one of modest reductions in emissions; the B1 scenario is one of more drastic reductions. Run all three emission scenarios (A2, A1B and B1) with the permafrost switch off and the land use switch on, then answer the following questions. Temperature (Page 1of the graph pad) 8. Which scenario produces the largest warming in 2100