探险家们甚至需要戴上特殊的面具来保护自己不受洞穴里气体的伤害。

Explorers even need to wear special masks to protect themselves from the gases in these caves.

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化学物质不仅伤害了吸入这些气体的居民，而且还殃及到附近至少2000只动物以及和树木，后者的叶子在数天内枯死掉落。

The chemical injured not only the people who inhaled it, but also nearby animals (at least 2, 000 of them) and trees, whose leaves went yellow and fell off within days.

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如果我们此刻不能达成协议，那么毫无疑问：若温室气体排放的增长不加控制，其伤害一旦造成，未来任何追溯性的协议也无法消除这一选择造成的后果。

If we do not reach a deal at this time, let us be in no doubt: once the damage from unchecked emissions growth is done, no retrospective global agreement in some future period can undo that choice.

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