| 1. | Another is the fact that rivers have for a long time been used as dumping grounds for waste generated by a range of human activities , including domestic sewage , livestock waste , industrial waste , and other types of effluent
另一个主要因素是历来河溪一直承受多种人类活动所产生废物的排放，包括住宅污水禽畜废物工业废物和其他污水。 |
