Achieving more aggressive environmental goals, particularly limiting warming to 1.5ºC, or zero greenhouse-gas emissions in the second half of the century, would of course be desirable in terms of minimizing the risk of disaster scenarios. In fact, the first INDCs, by themselves, are nowhere near enough even to limit warming to 2ºC (the global goal that was agreed in Cancún in 2010).
实现更激进的环境目标，特别是将变暖幅度控制在1.5℃之内或在本世纪下半叶实现温室气体零排放，当然是实现灾难情景风险最小化的好途径。事实上，第一批INDC本身并不足以将变暖幅度控制在2℃之内（2010年坎昆所达成的全球目标）。