For those of us who can turn on the faucet confident that there will be steady stream of clean water for bathing, drinking, cooking, washing dishes, the thought that the world could go dry seems incomprehensible.

• 对于那些拧开水龙头就会有清洁水源源不断流出来供洗澡、饮用、烧饭和洗碗碟的人来说，世界水资源可能枯竭的想法似乎不可思议。