Let's go to the Amazon basin, again, the richest terrestrial ecosystem on land, climate science estimates the risk of the Amazon rainforest tipping over irreversibly to a savanna at three to five degrees of global mean surface temperature rise.

我们再来看看亚马逊盆地，这里是陆地上最丰富的生态系统，气候科学估计， 当全球平均地表温度上升 3 至 5 度时， 亚马逊雨林就有不可逆转地变成稀树草原的风险。