good comments! — and for an entertaining read see also Feed or Feedback:
The world as most of us know it — big cities, big farms, relatively clean air and water, enough food for all — will probably come to an end in 50-100 years. That’s the punch line of Feed or Feedback: Agriculture, Population Dynamics and the State of the Planet, a 2003 book by A. Duncan Brown, emeritus professor of biology at the University of Wollongong (Australia). Brown writes entertainingly and with passion about long-term issues that will become increasingly important in the next few generations. Those issues mainly revolve around unsustainable resource use by modern large-scale farming. …
Mark Zimmermann. 2010-09-01 08:55 UTC.