The most efficient, global carbon cuts – designed to keep temperature increases under two degrees Celsius – would cost $40 trillion a year by 2100, according to research by Richard Tol for the Copenhagen Consensus Center. In the best-case scenario, this expenditure would reduce the at-risk population by only 3%.
而据理查德·图尔为共识研究中心所做的研究，到2100年，全球最有效的碳减排计划——旨在温度上升幅度控制在2摄氏度之内——将每年耗费40万亿美元。但即便在最理想的状况下，这笔钱也只能减少3％的受灾人口。