Better usage for the hemp would be paper & hemp crete (cheap houses) & textiles (first jeans were from hemp). Thousands of other possibilities, just search the

Better usage for the hemp would be paper & hemp crete (cheap houses) & textiles (first jeans were from hemp). Thousands of other possibilities, just search the net. But as a solution for carbon storage? Not sure about that ... trees are perennial, after the forest is established there are no other costs associated, it's also a habitat for the wildlife, so the biodiversity/extinction problem would be solved too.