沒有人知道阻止氣候變遷的最糟結果究竟該花多少錢，歷史學家哈拉瑞依據科學家和經濟學家的報告提出分析，表示人類僅需投資百分之二的全球GDP在相關解方，就能阻止這場災變。他認為，預防生態浩劫並不需要像許多人擔心那般造成全球癱瘓，事實上人類早已握有所需的資源 —— 但我們必須先轉換優先次序。

阻止氣候災變的確切成本

Preventing catastrophic climate change could be achieved by investing just two percent of annual global GDP in clean technologies and infrastructure. This figure is far less than the world spends on wasted food, fossil fuel subsidies, or even pandemic stimulus. Redirecting resources, not sacrificing modern life, is the key. The money exists, but shifting priorities and political will are essential to make this change happen.

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尤瓦爾·諾亞·哈拉瑞: 阻止氣候災變的確切成本