It is important for us to keep ecological balance. If we destroyed the natural resources recklessly around us, there would be a sterile land left .
The world originally like a green forist and human just like birds flying freely in it to look for food here and there. Unfortunately, people seem to forget how close they rely on the forist. Some of them fall a wide range of trees at will and there has nothing left.
It is Just like the depressed two birds in the destroyed forest, we whould have nothing to wear and eat.
就是悬赏450.。估计也写不出来。