If 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.
15 bizarre — but cool — green inventions
This could solve everything.