地球是我们人类共同的家园，人类只有一个地球。“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80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。
★ 范文
Let”s Do Something to Save Our Environment
It is recently reported that some rivers and lakes have dried up in South China. A lot of fishes died. The bottoms of the rivers and lakes have become grass land. The water is becoming less a
