工厂排放的有害污染物进入了附近的河流。

The factory's emissions introduced dangerous ___contaminants into the nearby river.

水处理系统可以有效去除饮用水中的污染物。

The water treatment system can effectively remove ___contaminants from drinking water.

工厂排放的污水中含有多种有害污染物。

The wastewater discharged from the factory contains various harmful ___contaminants.