Not to mention, besides the wood material being, well, wood... it's a relatively small amount when you think about it, and the amount of processing involved which basically turn it into a different material altogether outweighs any sustainability. Plus, with all the glues / epoxies / whatever they use, that wood-based material isn't going to be degradable at all. It puts me in mind of "bamboo" products, which also relies on a lot of glues and processing to make it a wood analog.