Climate impacts were monetized using estimates of the social cost of carbon—the valuation of the damages due to emissions of one metric ton of car- bon, of $30/ton of CO2equivalent (CO2e), 20 with low and high estimates of $10/ton and $100/ton. There is uncertainty around the total cost of climate change and its present value, thus uncertainty con- cerning the social cost of carbon derived from the total costs. To test for sensitivity to the assumptions about the total costs, low and high estimates of the social cost of carbon were used to produce low and high estimates for climate damage, as was done in the 2009 National Research Council (NRC) report on the “Hidden.
