为什么探索如此重要英语作文（为什么海洋探索很重要英语议论文）

As we all know the sea food we eat is from the oceans.In the past,the oceans was very clean and beautifull,there were a lot of sea animals in them.But nowadays the oceans is dirty,many sea animals are die.

We must keep them clean.We must stop polluting them.The oceans is very important to us!