用英文写一篇题为“Global Shortage of Water”的文章。内容包括：
(1)人们认为水资源是取之不尽的(提示：雨水、井水、河水等)；
(2)水资源紧缺的原因(提示：人口增加、工业用水增加、污染等)；
(3)你的建议是…

A. mice and humans have similar brain structure
B. humans are likely to be more lazy than mice
C. human’s appetite is regulated through the same pathway as mice’s
D. mice and human body use different pathways of appetite control