Trial 4: Now, your goal is to manipulate the model to come up with a plan to keep atmospheric carbon dioxide concentrations below the orange line on the graph (550 pm). Play with the model until you come up with a way to reach this goal. What parameters are necessary to reach a stable level below 550 ppm? How would you achieve this in the real world? For example, what types of policies or treaties or technological developments would be necessary? Multiple thoughtful sentences are expected here.Think about what this type of treaty (in Trial 2) would mean for different countries. Consider two countries - (1) Canada, a wealthy, industrialized, and high carbon emitting nation, and (2) Niger, a poorer, less industrialized, and low carbon emitting nation in sub-Saharan Africa. How would a treaty that requires countries to cap emissions at their 2030 level affect Canada vs. Niger? Which of the two countries would be most likely to support such a treaty, and why? (Multiple thoughtful sentences are expected for a complete answer.)