There are a lot of useful, human get many benefits as follows: first, trees provide us with wood and other products. Second, their roots can let the rain soaks in and keep the ping soil to avoid being washed away, so the trees can prevent droughts and floods. Trees also help us to purify air, beautify the living. As long as people don't destroy the earth environment, is the best protection for the trees.有很多的用处，人类从中得到如下很多益处：第一，树给我们提供了木材和其他一些产品。第二，它们的根能让雨水渗进并保持乒壤以免被水冲走，所以树木可以预防旱灾和水灾。同时树木还帮我们净化空气，美化生活。 只要人不破坏地球环境，就是对树木的最好的保护。