阅读短文，回答问题。
The green and brown parts on the map are forests and land. People live on the land and wild animals live in the forests. The blue parts are the oceans. There are five oceans on the Earth. They are all very big. People can get different kinds of seafood from the oceans. They are all delicious. In the past, there were many fishes in the oceans. The oceans are getting dirty. We should stop throwing rubbish into the oceans. We should protect the oceans, the forests and the land because the Earth is our home.