除了要适应气候变化，全世界也必须减少温室气体的排放以降低这个星球未来所面临的风险。 温室气体正是人为气候改变的罪魁祸首。
In addition to adapting to climate change, the world must also reduce future risks to the planet by cutting back on emissions of greenhouse gases, which are the source of man-made climate change.