When you are on tour in the UK it takes a few hours to get anywhere. A lot of the time you can have a beer, close your eyes for two minutes, and then you are there. In the U.S. it is much more like a road trip as all the cities are so spread apart.
If you look at it ecologically, deforestation is high on the list of things which bring devastation. You cut down trees to build homes, for fuel, and you end up with no trees left, and you have to move on. If you take the earth as a whole, eventually there's nowhere to move on to.