你们学校决定组织一次“Planting Trees for the Earth”植树活动，假设你是班长，你要动员你班同学参加这次活动，请完成你的发言稿。
内容要点1.根据情况介绍分析森林的现状并分析这种状况的原因。
2.阐明植树的意义：至少从两个方面说明数明对环境保护的作用。
3.提出如何保护树木的建议。
要求：1.次数70-80，已给出的句子不计入总词数。
2.表达准确，语句通顺，书写规范。
下面开始作文：
Dear fellow students,
Forests are important to the environment.________________________________________________________________________
后面的自己写
急用！！！不管是自己写的还是转载的 都快点！
Nowadays, the forest disappears gradually and the trees were cut down rapidly, it is the root cause of air pollution. We have to stop excessive cutting trees from the forests, otherwise we don't have any fresh air to breathe. In order to save the forest, we have to plant more trees and stop making wastes such as using lesser papers in classrooms. Now, let's go together to join the activity " Planting trees for the earth ".