水污染

例句：

1. 1. The river is severely polluted with industrial waste.
   这条河被工业废物严重污染了。
2. 2. To protect the environment, we need to reduce our use of plastic and avoid littering.
   为了保护环境，我们需要减少使用塑料并避免乱扔垃圾。
3. 3. The government has implemented strict regulations to prevent water pollution from entering the ocean.
   政府已经实施严格的规定，以防止污水进入海洋。