That is a necessary step if we are to head off the most dangerous consequences of climate change. To prevent world temperatures from rising above the 2º Celsius threshold that climate scientists believe represents a tipping point beyond which the worst effects could no longer be mitigated, we will need to leave approximately 80% of known fossil-fuel reserves untapped.
如果我们想阻止气候变化的最危险后果，这是不可缺少的步骤。为了防止世界气温上升幅度超过2℃的阈值，我们必须让大约80%的已知化石燃料储备保持原状。气候学家认为，如果升温幅度超过2℃，就将无法减轻气候变化的最恶劣影响。