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15 bizarre green inventions

By: Laura Moss on Feb. 25, 2011, 10:35 a.m.
pencil printer

Photo: Hoyoung Lee/Yanko Design

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Pencil printer

When Hoyoung Lee’s concept printer becomes reality, you’ll never throw away another pencil stub and never buy another ink cartridge. The pencil printer separates the wood from pencils and uses the lead to print documents. There’s even a built-in eraser component that allows you to remove text from a page and reuse the paper, so you’ll be saving money and trees.