书面表达（满分12分）

     地球是我们人类共同的家园。“低碳、环保”已成为当今时代主题。目前，我市英语学会准备在全市中学生中开展以“Save(拯救）our earth”为主题的英文征文活动。现请你根据以下三个方面的提示，写一篇70词左右的短文参评。
1. 重要性：只有一个地球
2. 主要问题：污染、疾病、灾难
3. 措施：停止污染、保护大自然
参考词汇：disaster n.灾难  protect V. 保护
注意：(1) 文中不能出现真实姓名、校名；
(2) 文章标题已给出，但不计入总词数；
(3) 可适当发挥，以使行文连贯。

参考范文

     We all live in the earth. The earth is our home. We have only one earth. We must take care of it. It gives us the best environment. If we harm it, it will be angry. And then we will have a terrible end. There are three problems in our earth, they are pollution, disaster and illness.

     It’s our duty to protect our environment. So we must plant more trees, protect the flowers and the trees, reduce the pollution. 

     Protecting the nature is very important. It’s our duty to keep our environment clean and tidy. If everyone makes a contribution to protect the environment, the earth will become much more beautiful.