焚烧树叶对人有害
【内容提示】
根据内容提示写一篇提醒人们不要焚烧树叶的文章，说明焚烧树叶产生的烟雾，会污染环境，有害于人们的身体健康。
内容梗概：
前几天你去火车站给朋友送行，路上看到清洁工人正在烧树叶，你由此联想到老师曾讲过树叶燃烧的烟尘会对大气造成污染，并直接影响人体健康，导致癌症。你在文中呼吁人们不要烧树叶。
【作文示范】
Burning Is Harmful to People
A few days ago, I went to the railway station to see my friend off. On the way I saw street-cleaners burning dry leaves. What they do is wrong.
Burning things does harm to people. I remembered that our teachers once told us that burning dry leaves would give off smoke and dust which in turn pollute air. And what is more, it would be harmful to people＇s health. When people breathe the air with smoke, the smoke might lead to cancer. As a result, the cancer would cause people to die.
As we all know, leaves can make very good fertilizer. It would be better to collect them for the fields.
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