David Montgomery, a UW geomorphologist, is an authority on dirt. Don’t laugh. His new book, "Dirt: The Erosion of Civilization," links the decline of great civilizations to the loss of their soil.
Things are getting worse, he said in an interview posted on the Celsias Web site:
Modern agricultural soil erosion rates are as many as 10-100 times faster than soil creation – a minority of farms are a net soil source, but very few, so we are consuming ourselves to death. It’s like a bank account. If you spend money 10 times faster than you make