[CWuestefeld]

When speaking of tree-derived products, is recyclability a green feature?

Trees fix CO2, so having an excuse to grow more trees, sucking CO2 from the atmosphere, and depositing it in the form of bikes, may be a benefit.

It likely comes down to the amount of energy used in the manufacture. I don't actually know, but intuitively I'd guess that steel manufacture (or aluminum on lighter bikes) uses a lot more energy to manufacture.