One prescription that is bandied about with increasing frequency certainly sounds sensible: the world should drastically cut the amount of greenhouse gases that it pumps into the atmosphere each day. Specifically, we are told, the goal should be a 50% reduction in global carbon-dioxide emissions by the middle of the century.
对此有一种解决方案正日渐流行，而且听上去似乎也合情合理，那就是全世界必须大幅削减每天的温室气体排放量。具体来说，目标就是在本世纪中期将全球二氧化碳排放量减少50%。