At present the (1) dynamic balance between man and nature and between nature and society as a whole has shown (2) signs of breaking down. The problem of the so-called replaceable resources of the (3) has become particularly (4). It is getting more and more difficult to satisfy the needs of human beings and society even for such a substance, for example, as fresh water. The problem of (5) industrial waste is also becoming increasingly (6). 目前,人与自然以及自然与社会整体之间过去存在的动态平衡,已呈现崩溃的迹象。生物圈中所谓可替代资源的问题变得极为尖锐。人类和社会的需求,即便是简单得像淡水一样的物质,也变得越来越难以满足。清除工业废物的问题也变得日益复杂。