I have only anecdotal sources claiming that hemp isnt a great alternative considering the land/water usage vs the product created, compared to say bamboo. Do you know anything about that?
Bamboo grows extremely slowly and can actually emit CO2 in hotter climates during the warmer season. Hemp grows extremely quickly and sucks down CO2 like a vacuum. Hemp doesn't require harsh chemical pesticides, and it doesn't require really high irrigation. It can fully replace cotton. While bamboo can be made into clothing (I do have a bamboo PirateBay T shirt) they just don't compare too well.