in the peer-reviewed rapid prototyping literature. This device proved viable for producing 3D printing filament. The Recyclebot v2.2 is being developed by the Michigan Tech in Open Sustainability Technology Research Group. Many makers or DIY enthusiasts have made various versions of RecycleBots. The most notable is the Lyman filament extruder. Lyman, a retired engineer, won a design contest to make a low-cost 3D filament fabrication system. As of 2014, there were many types of recyclebots, many of which are at the early stages of commercialization. Recyclebot technology has been applied to hangprinters to allow for fused particle fabrication of large prints without first having to form filament. Futurist speculation Jeremy Rifkin has hypothesized that such recycling with recyclebots and distributed production with 3D printing will lead to a zero marginal cost society. The science-fiction author, Bruce Sterling wondered in Wired if recyclebots and 3D printers might be used to turn waste into guns. Recyclebots can provide a new method of recycling. References Recycling Fused filament fabrication Plastic recycling