Roscoe Jackson may be a new kid on the block, but they have some of the best looking sustainable furniture I have seen in a long time. The new Possum furniture collection is made of 100% HDPE (from milk jugs and such) and stainless steel fasteners. This results in a chair that is both sturdy and suitable for indoor or outdoor use. The design reminds me of Bludot's Barabarella line of furniture, which is a good thing. While the Possum furniture may not be as cheap as a Ikea plastic chair you at least get the satisfaction of knowing that you money is supporting both an environmental cause, as well as a great startup design firm.
Available from RoscoeJackson.com or Sprout home from $198 - $285.