You're misunderstanding what I wrote. What I claimed was: (a) There is (at present) sufficient land for us to be able to sustainably plant enough trees to supp

You're misunderstanding what I wrote. What I claimed was: (a) There is (at present) sufficient land for us to be able to sustainably plant enough trees to supply our need for such composites (including to the extent that they may substitute for our consumption of plastics), and (b) Planting trees as part of this practice would likely be (non-trivially) beneficial in the fight climate change. I did not claim that: (c) Planting trees would somehow be sufficient to single-handedly solve climate change without us having to change any other of our current practices (like farming), or (d) The planet would always have room for sufficient trees (for any purpose) regardless of how long current trends continue or how badly we continue to destroy more and more of the environment.