【正文】
annual Arbor Day is ing. Many people take action to plant trees and protect trees. I think we can’t only protect trees on arbor day. We should always care about and protect our green. Hundreds of millions of years ago, the earth was lush with plants, vibrant everywhere and full of green. However, after the emergence of human beings whose IQ was far higher than that of other animals, they cut down indiscriminately and did not know how to make rational use of them in order to live and survive, resulting in a sharp reduction of trees and many negative effects. Such as the rapid extinction of animals, soil erosion, bad weather... Such examples are numerous. Most importantly, trees can absorb carbon diox