这种化学污染有两个来源：直接把污水倒进河里的工厂，和把未经处理的人类垃圾倒进河里的本地社区。
This chemical pollution has two sources: the factories which dump polluted water directly into the river and the local community which dumps untreated human wastes into the river.
人类每日会产生大量的垃圾，大量的垃圾未经分类回收再使用并任意弃置会造成环境污染。
Humans produce abundant rubbish every day, which can cause pollution if it is abandoned at will without recovery and recycling.
由于工业企业和城市排水系统直接向江中排放大量未经处理的污水和雨水，使柳江受到污染。
The Liujiang is polluted because industries and the city drainage system directly discharge into it significant raw sewage and rainwater.
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