In April of last year, a confidential document from the US Department of Defense warned that by 2020 climate change could lead to large-scale food and water shortages. Large numbers of people around the world could thereby be forced to move to regions with milder climates, compelling the US to close its borders, and perhaps even leading to nuclear proliferation and war.
去年 4 月美國國防部一份機密文件解密，指出 2020 年氣候變遷將導致食物和水源大量短缺，全球許多人民將被迫遷移到氣候較適合的地區，使得美國必須封鎖邊境，甚至進一步可能導致核武擴散及戰爭產生。