I have been coming across a lot of environmentally-friendly printers as of late. Discarded toner cartridges are quite harmful which is why alternatives like the Reenk Pen Ink Printer are being created.
Rather than just throwing away those old ball point pens, you can now use them for fuel to print off all of your important documents. The Reenk Pen Ink Printer forms a link in a growing line of green computer peripherals that are surely going to dominate the market in the not-so-distant future.
Mainstream 3D Printers
3D Food Printers
Ultra-Green Printers (UPDATE)
The Reenk Pen Ink Printer Sets the Tone for Eco-Conscious Copiers
By: Alex Scott - Published: Mar 2, 2010 • References: yankodesign