We all know that trees can be recycled carbon dioxide, with a large number of felled trees, the number of trees will be drastically reduced, we can not be exhaled carbon dioxide cycle.

• 大家都知道树木可以循环二氧化碳，如果大量砍伐树木，树木的数量就会急剧减少，我们呼出的二氧化碳无法得到循环。