"Tens of thousands. We get all the food from the surrounding farmland," she says, sweeping her hand expansively over the area. "As well as fish from the sea, and the like, and probably a lot more delivered by ships. There really aren't any trees any more, because we cleared them out to make space, or to use them for building material. And, yes, it can be overwhelming the first time you see it, but you'll probably find it has more in common with the forest than you'd imagine."