Manifold paper: a thin, light-weight paper used for duplicating work with carbon paper or for air mail letter.

打字纸：薄而轻身的纸。作空邮信纸或连同碳纸作为写文件用。收藏。

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For individuals, a trip on a plane, the use of air conditioning, writing on a piece of paper, even sending an E-mail will produce carbon footprint.

对于个人，在飞机上旅行，使用空调，在一张纸上写，甚至发送一个电子邮件将产生碳足迹。

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