砍树对地球有什么改变?我们该怎么做?(用英语说)

We should keep the balance of nature with all our force,shouldn't we?People who log trees are selfish,they only want their money.But,trees supply the oxygen and absorb the carbon dioxide,they are very important to us.The green house effect is becoming a more and more serious problem,as one of the livings live on the earth,we should fight against this sort of thing happen.