（翻譯）2016美國數學建模MCM E題(環境)翻譯:咱們朝向一個乾旱的星球？

PROBLEM E: Are we heading towards a thirsty planet?html Will the world run out of clean water? According to the United Nations, 1.6 billion people (one quarter of the world's population) experience wa

>>阅读原文<<