Preserved Diversity


  1. learn from trial and error
  2. apply safety factors
  3. preserve options
  4. avoid large scale irreversible change


David A. Bella and W. Scott Overton, 1972, Environmental Planning and Ecological Possibilities, Sanitary Engineering

Stephen Schneider, 1976, The Genesis Strategy.

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Updated:Wednesday, 22-Sep-1999 12:37:36 PDT URL is