题目内容：
根据下列材料请回答题：
It is estimated that water use will rise by 50% in the next 30 years.
参考答案：
答案解析：
单选题：根据下列材料请回答题：It is estimated that water use will rise by 50% i
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It is estimated that water use will rise by 50% in the next 30 years.