books.google.ca - The Rocky Mountain West is largely arid and steep, with ecological scars from past human use visible for hundreds of years. Just how damaging were the past 150 years of activity? How do current rates of disturbance compare with past mining, grazing, and water diversion activities? In the face of constant...http://books.google.ca/books/about/Rocky_Mountain_Futures.html?id=zxvFXkH0828C&utm_source=gb-gplus-shareRocky Mountain Futures
