Filament

Two college students invented an adapter that allows 3D printers to print in ... - GigaOM

Study: Recycling plastic at home saves energy and dramatically cuts 3D ... - Earth2Tech

3D printing with old milk jugs saves both money and energy - Geek

3-D printing 'ink' is way too expensive - CNNMoney

It's about to get easier to 3D print with recycled plastic - GigaOM

Reinventing the Extruder- The Dual and the Quad

It's Time For Filament Standardization