Sierra Resins has teamed with 3D Printlife to create and market a new type of 3d printer filament. They are calling this filament biofilament because of it's ability to easily biodegrade. The new environmentally friendly plastic is undergoing end stage testing and is expected to be on the market sometime this year:

http://3dprint.com/1733/sierra-resin...stic-filament/

This is certainly a nice move by the company and one that will certainly be heralded by the industry.