Action is urgently needed to contain global warming and prevent a disaster for humanity; yet the global community is desperately short of tools. There is not much support for the most desirable solutions advocated by economists, such as a global cap on greenhouse-gas emissions, coupled with a trading system, or the enforcement of a worldwide carbon price through a global tax on CO2 emissions.
急需采取行动遏制气候变暖、阻止人类灾难；但全球社会极度缺乏工具。经济学家所宣扬的最合理的方案——如全球温室气体排放限额和相关的交易制度，或通过全球二氧化碳排放税执行世界范围内的碳定价——得不到多少支持。