No doubt it took a great deal of wood; this is also one of the reasons Pennsylvania in America developed a metallurgical industry. Plentiful wood for charcoal

No doubt it took a great deal of wood; this is also one of the reasons Pennsylvania in America developed a metallurgical industry. Plentiful wood for charcoal (this was before they started using coal, which Pennsylvania also had in abundance) However I just want to point out that an acre really isn't that big. A single typical Roman fortification could easily cover tens of acres just inside the walls. "acres of wood" isn't really saying much.