Hemp would be better, btw. Because it grows faster and can be harvested twice a year. Big amount of very useful biomass for many useful products. Where at this

Hemp would be better, btw. Because it grows faster and can be harvested twice a year. Big amount of very useful biomass for many useful products. Where at this planet all these trees should or could be planted? Where could be the most efficient place for it? Most of the trees in one big area, or better wide spread around the globe? How would it impact the actual nature and plants around? Which sort of trees? Could hemp be more efficient?