1. (2023高三上·大兴期末) 阅读下面短文，根据短文内容填空，在未给提示词的空白处仅填写1个适当的单词，在给出提示词的空白处用括号内所给词的正确形式填空。

After 15 years of working to raise climate urgency I've concluded the public and world leaders underestimate how rapid, serious climate and ecological breakdown will be if humanity fails (organize). There may only be five years (leave) before humanity expends the remaining "carbon budget" to stay under 1.5℃ of (globe) heating. And there may only be five years before the Amazon rainforest and a large Antarctic ice sheet pass irreversible points.