> Livestock accounts for 77% of all agricultural land space and takes up about 30% of the world's habitable land. That us a HUGE proportion of land You omitted

> Livestock accounts for 77% of all agricultural land space and takes up about 30% of the world's habitable land. That us a HUGE proportion of land You omitted the fact that livestock is often raised in land unsuitable for cultivation. Not all pasture can be converted to farms. Most pasture is in grasslands. Closing these pastures would not free up land for reforestation. Taking up habitable land is also not surprising. Everyone needs to eat, so it makes sense to put farms close to population centers. Doing otherwise would result in higher transportation costs (and more carbon emissions). Living space also isn't a constraint in most developed countries. Their populations are shrinking and urbanizing. Why are you so intent on finding problems for veganism or vegetarianism to solve? Vertical farming is promising, but it requires energy. It's tough to compete against traditional farming where energy is free from the sun. Using solar power is obviously not efficient - crops outdoors are already solar powered. Maybe feasible with more nuclear power, but that's not popular these days.