Dialogue between man and paper

Paper: Do you think paper is expensive?

People: Not expensive, one yuan can buy a book, a book has dozens of pages!

Paper: Do you know the raw materials of our paper?

Man: What?

Paper: Tree, the green tree!

Man: Ah? It turns out that it seems that wasting paper is to cut trees!

Paper: Yes!

Person: It seems that you can't waste paper in the future.

Paper: Not later, now, let us save paper together!