单选题
0分
72 . Our increasing population will tremendously increase urban wastes,primarily sewage. 73 ...
72 . Our increasing population will tremendously increase urban wastes,primarily sewage. 73 Rapidly expanding industries which involve more and more complex chemical processes will produce larger volumes of liquid wastes, 74 . To feed our rapidly expanding population, 75 . This will involve ever-increasing quantities of agricultural chemicals.
参考答案: C
参考解析: 空格前面的句意为:我们日益增加的人口将极大地增加城市废物,主要是污水。本句从另一角度提及污染问题的根源。对水的日益增长的需求会导致污水的增加。故选C。