提示:1)树木在保护环境方面的作用:吸收有害气体,是对抗空气污染的主要斗士;
2)树木在我们日常生活中的贡献:很多家具来自于木材,纸张来自于木材;
3)树木面临的问题。
Dear students,
As we all know trees are very important in our lives. We can't live in the world without trees.
Thank you very much for your listening.