题目内容：

你和家人外出郊游时，看到化工厂附近一条污染严重的河流:臭气熏天，大量死鱼漂在河面上，景象惨不忍睹。当晚又碰巧看到电视上黄河断流的新闻报道，心情十分沉重，你决心写一封倡议书呼吁全校同学去保护水资源。

用英语写一篇150词左右的短文，要求包括上面所述内容。

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