Trees are very important to humans.First all,trees can make the inviorenment look more beautiful. Secondly,lots of trees are good to people’s health,they can also release oxgan and absorb carbon dioxide. Thirdly,they can be used to do many things,such as constructions,make papers and make lots of other things,many things in our house are made of trees.
Finally,we should plant more trees and protect them ,we should forbid people to cut trees at will so as to ensure the balance of ecological .
参考资料:自己写