同样的，水坝的修建和河流的改道目前非常普遍，人类对水资源的消费量已经比100年前增加了9倍。 也就是说，现在人类已经使用了超过半数的可用的水资源 — — 其中大约有三分之二用在了农业上面。
Similarly, dam building and river diversion have become commonplace, as humans’ water consumption has risen nine-fold over the past century, to the point that mankind now uses more than half of all accessible fresh water – roughly two-thirds of it for agriculture.