And we shouldn't underestimate the scale and the transformative nature of the change which will be needed, because we have to go to zero carbon emissions by about 2050, if we're going to stay below two degrees Celsius of warming.
我们不应低估需要改变的程度， 需要改变的方式， 因为我们 必须在2050年之前实现碳的零排放。 才能把全球变暖控制在2度以内，