"Fortunately" for the sake of this problem, we've got 1000 years of land that was cleared to get lumber. Not all of it is land that we could replant trees on (s

"Fortunately" for the sake of this problem, we've got 1000 years of land that was cleared to get lumber. Not all of it is land that we could replant trees on (some being used for farming or housing), but for a decade-long society-wide project I wouldn't be too concerned, if there were actually political will to do it.