What is being asked is that global emissions be less than half their 1990 levels by 2050, having peaked before 2020. Since emissions from the developing countries are on the whole lower than those of the developed world – and will need to continue to rise in the short-term as they maintain economic growth and address poverty – it has been proposed that developed countries cut emissions by at least 80% relative to 1990 by 2050, with major steps towards this goal over the next decade.
但是，我们也面临着一些现实的问题。我们的目标是全球碳排放量到2020年达到最高高峰，随后到2050年将削减到不到1990年水平的一半。由于发展中国家的排放量低于发达国家——所以说，随着发展中国家的脱贫政策和经济的不断增长，在短期内碳排放量会上升——有人提议，到2050年，发达国家的碳排放量至少应该削减以达到1990年水平的80%。要实现这个目标，看来还有很多事情要做。