We need more photosynthesis (again). I've often thought that vast swathes of otherwise barren land on this planet could be used for cultivating hemp and Cannab

We need more photosynthesis (again). I've often thought that vast swathes of otherwise barren land on this planet could be used for cultivating hemp and Cannabis, for a vast amount of uses (not just getting high). It obviously grows very quickly compared to trees. And like 'a weed'. The 're-greenification' of land would be rapid.