It is a classic public-goods problem: in principle, it is in individual countries’ self-interest not to take action, while the rest of the world does. Compounding the challenge further is the fact that the benefits of actions taken today accrue in the distant future.
气候变化的全球性质带来另一个挑战。这是典型的公共利益问题：原则上，在世界其他国家采取行动时，不采取行动符合个别国家的自身利益。难度更大的是今天行动的好处只会在遥远的未来逐步显现。