What does it mean that "China holds the key to the success of humanity's efforts to prevent catastrophic climate change?"

作者在文中提出的“在人类防止灾难性气候变化的努力中，中国是成败的关键”这句话是什么意思？

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"Had we had to do it over again, we would look at the consequences of catastrophic success -- being so successful, so fast, that an enemy that should have surrendered or been done in, escaped and lived to fight another day, " Bush told the magazine.

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Coming so soon after Seattle, any meeting would need to be a stunning success to avoid being judged a catastrophic failure, and would also run the risk of a repeat of Seattle-style chaos.

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In contrast, focus on success often encourages complacency which leads to profound and catastrophic failure.

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