The marginal cost of carbon reductions range from $46 to $138/metric ton through 2015 with each scenario showing successively smaller costs as technology characteristics improve and more energy-efficient and/or low carbon technologies penetrate the market.
The improvement of technology characteristics appear to have contributed to the increasingly smaller costs associated with carbon reductions.
The range of the marginal costs associated with carbon reductions were between $40 to $100 per metric ton in 2015.