Shellfish

The passage and lecture both discuss a kind of shellfish, which is dubbed zebra mussel, and its impact in North America. The reading claims that the invasion of this creature cannot be stopped and it would be a prominent dangerous. In contrast, the professor explains that there are some effective ways to control zebra’s spread…

Land for human needs is important than land for endangered a

Some people think that the human needs for farmland, housing, and industry are more important that the saving land for endangered animals, but I personally don¡¦t agree about that. I believe the land for animals are more important. The reason is that the disappearance of land for animals will cause unbalance for our environment. First,…