The land needs to be converted to natural forest if we want a shot at significant reduction of greenhouse gases in the atmosphere. Agroforestry and silvopasture are the next best things, but a huge problem with animal agriculture is the land use change. We simply need a LOT of land to go back to natural forest.
Not all land is naturally suited to be forest land. See, for example, the badlands (grasslands) in the Dakotas and Montana. Those badlands are actually pretty good ranchland, since the wrinkled terrain is ill suited to farming.
