水是生命之源,然而越来越多的事实表明可供人类利用的水越来越少。面对全球日益枯竭的水资源和鱼类等水产资源,许多全球性和区域性的水资源评估项目被实施,以助于这些水问题的解决。但是,被称为地球的宇宙飞船上连年增加的人类乘客则进一步加剧了这些问 Water is the source of life, but more and more facts show that less and less water is available to human beings. In the face of an increasingly depleted aquatic resource such as water and fish, a number of global and regional water resource assessment projects have been implemented to help solve these water problems. However, the increasing number of human passengers on spacecraft, termed the Earth, exacerbated these questions