再污染

例句：

1. 1.The factory has been polluting the river with its wastewater for years.
   这家工厂多年来一直在用废水污染这条河流。
2. 2.The pollution of the environment is a serious problem that needs to be addressed.
   环境污染是一个严重的问题，需要得到解决。
3. 3.The government has announced plans to clean up the area and reduce pollution.
   政府宣布了计划，清理该地区并减少污染。