求翻译：清洁工回答说对此不知，又说因为没有地方存放树叶，只好烧掉。我想到科学家说过烟尘会导致癌症，我认为不应该把树叶烧掉，而应当肥料使用是什么意思？

Cleaners said this I do not know, and that because there is no place to store the leaves had burned. I think scientists said dust can cause cancer, I think it should not burn leaves, and fertilizer use should be

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The sanitation engineer replied said regarding this did not know, also said because does not have the place depositing leaf, has to burn down.I thought the scientist had said the mist and dust can cause cancer, I thought should not burn down the leaf, but must the fertilizer use

Janitor replied I do not know about this, and that because there is no place to store leaves and had to burn. I think scientists said dust can cause cancer, I think that we should not burn leaves, but fertilizer use

Cleaner answer right this know, say have place deposit leaf again, have to burn. I expect it will cause cancer that the scientist has said the smoke and dust, I think I should burn leaves, and should fertilizer use