It was built of stone but the thousands of soldiers and others required huge amounts of wood, also from the article: > Using modern day scientific studies of t

It was built of stone but the thousands of soldiers and others required huge amounts of wood, also from the article: > Using modern day scientific studies of the region and inferring likely effects of the occupation, we can look at the environmental impact of this conflict. There were several major consequences to the environment. First, the area had massive deforestation, which has been confirmed by scientific studies and can be inferred from the increase of population on this frontier. One study indicates that, “it was not until Romano-British times that man had much effect on the forests of the area. Organized clearance and farming in this marginal frontier zone of the Roman Empire was on a scale unparalled in history until recently”