Table SPM.2: Increase in global mitigation costs due to either limited availability of specific technologies or
delays in additional mitigation relative to cost-effective scenarios.2 The increase in costs is given for the median
estimate and the 16th to 84th percentile range of the scenarios (in parentheses).3 In addition, the sample size of
each scenario set is provided in the coloured symbols. The colours of the symbols indicate the fraction of
models from systematic model comparison exercises that could successfully reach the targeted concentration
level. {Table 3.2}