One day I went to a paper factory.But I found that the factory was pouring waste water into the river near it.The river had become very dirty.Lots of fish had died.That was terrible.It could harm the environment.
文摘One day I went to a paper factory.But I found that the factory was pouring waste water into the river near it.The river had become very dirty.Lots of fish had died.That was terrible.It could harm the environment.