It is almost beside the point that the economic cost of pursuing a goal of 1.5ºC would be very high. In any case, leaders can’t make credible commitments 35 years into the future.
宣布宏大目标与实现这些目标是完全不同的。实现1.5℃目标的经济成本很高，这根本不是问题的重点。无论如何，领导人都无法做出未来35年后的可信承诺。而如果一项计划要想影响到今天的众多商业决定，它就必须是可信的。