My guess is probably not, because photosynthesis is not very efficient. See https://en.wikipedia.org/wiki/Photosynthetic_efficiency https://en.wikipedia.org/wik

My guess is probably not, because photosynthesis is not very efficient. See https://en.wikipedia.org/wiki/Photosynthetic_efficiency https://en.wikipedia.org/wiki/Photosynthetic_efficiency But if the trees are already grown then I think we should use them, and not just leave them to rot.