这是一篇看图作文，作文体裁夹叙夹议，先描写图画内容，人们滥伐森林，造成水土流失，导致沙丘、沙尘暴的产生，人们重新植树，有效抵制沙丘的进攻；再议论图画所暗示的深刻含义，呼吁人们重视生态平衡。
参考例文：
A i hown in the picture，tree play an important part in water and oil conervation. In the left picture， people are fleeing from and dune becaue they cut down all tree. In the right picture， people have planted many tree and the and ha retreated.
People hould realize the important relation between human and nature. If we continue to detroy foret， detroy the balance of nature， the real victim will be u human.
It never too late to mend. After uffering from and torm， people have now realized the importance of tree in water and oil conervation. They are planting more and more tree to fight againt the greedy deert.