Peter Danko is a designer that takes sustainable design very seriously. In this diagram from his website you can see the benefits of using ply-bent wood over solid wood for making furniture. The amount of wood used is greatly decreased. Wood is also one of the only materials that puts off oxygen.
This chair is an example of the ply-bent wood. You can see that Danko is not sacrificing any style for sustainability.
This chair called "equilibrium" is made of recycled car seatbelts and the ply-bent wood painted black. The adhesives are water bourne so they do not emit damaging chemicals.