When it comes to leaving the trees in the forest, you have to take into account the fact that mature trees will produce less oxygen than growing trees, and if n

When it comes to leaving the trees in the forest, you have to take into account the fact that mature trees will produce less oxygen than growing trees, and if nobody cuts the old trees down, when they do fall themselves and succumb to decay, all of the captured CO2 will be consumed by aerobic organisms and thus released back into the atmosphere.