Look how much more space we'd have without sprawl
If we could just get everyone in the world to pack in a little tighter, we'd have a hell of a lot more open space to work with. Imagine the possibilities! We could pack everyone into the Midwest, fill Canada with wind turbines, and leave everything else for wildlife. Okay, maybe that's not realistic, but the point is that dense living frees up a lot of the Earth's surface area.