近两个月来，北京多次出现沙尘暴天气，让人们不得不去想如何保护环境。假如你是北京某中学高一学生，你班为此开展了一次演讲比赛，主题为“What can I do for our environment?”。请你根据下图所示写一篇英语演讲稿。

    1．词数100--120，开头和结尾已为你写好，不计入总词数；

    2．可适当增加细节，以使行文连贯。  

Boys and girls,

      As we all know，a few sandstorms have occurred to Beijing in the past two months．

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So，let’s start doing every small bit that we can right now．

    Thanks for your listening．