联合国环境规划署提醒我们，即使每个国家都实现现有2030年减排目标，我们也无法将变暖限制在前工业化水平以上1.5℃以内。 巴黎协定认为，如果超过1.5℃的阈值的话，气候变化的影响将大幅增加。
As the United Nations Environment Programme recently reminded us, even if every country hits its existing 2030 emissions-reduction targets, we will be unable to limit warming to below 1.5° Celsius above preindustrial levels – the threshold, recognized in the Paris agreement, beyond which the impact of climate change becomes far greater.