The key facts about climate change are well-known: Our planet's atmosphere has already absorbed such a large quantity of human-produced greenhouse gases that global warming is underway, with more extreme heat waves, droughts, and floods than ever before. Arctic sea ice is melting, and rising sea levels are threatening to inundate low-lying densely populated coastal regions in several countries.
关于气候变化的重要事实已是众所周知：地球大气层吸收了极其大量的人为产生的温室气体，以至于地球正在变暖，极端热浪、干旱和洪水比以往任何时候都要频繁。北冰洋冰盖正在融化，上升的海平面有可能吞没一些国家低海拔沿海地区。如果降水模式发生改变，有可能将有数亿人沦为气候难民。