And that's the difference between problems that are additive, like CO2, which we go slowly up and then we tip, and problems that are depletive, in which we lose what we have, which oscillate, and they oscillate until we lose everything we've got.
这个就是可添加性问题， 像二氧化碳问题，慢慢上升然后达到最高峰， 跟耗尽性问题， 我们失去我们所拥有的某种资源， 这种资源一直变动，直到 我们完全用尽这种资源。