However, there are many areas of the world where you can't grow human-edible food on the land currently being used to grow grass for feeding livestock. Of cours

However, there are many areas of the world where you can't grow human-edible food on the land currently being used to grow grass for feeding livestock. Of course this is not true everywhere, but a lot of area, e.g. in the UK, could only be used for grazing cows or sheep, if not left for nature.