一篇英语作文say something about trees写有关树的重要性啦,用途啦,并且我们如何保护它们啦,等等,

Trees are very important to us on the earth.But the number of the trees in the world is getting smaller and smaller
再问： 。。。就这么点。。。
再答： 接上面的
再答： 我一会发给你
再问： 哪个??
再答： So we must protect them. we can use them in many ways .them can give us a lot of food and fruit .And we can make many medicines from the trees .Please remember we can't live without trees.
再答： 可以了吧