1. Editorial: Immigration Debate in a Pressure Cooker

   • Virginia Deane Abernethy

   Editorial Introduction Pages: 99 - 108

2. The Zen of Sustainable Use of the Planet: Steps on the Path to Enlightenment

   • John Cairns Jr.

   OriginalPaper Pages: 109 - 123

3. An Optimum Population for North and Latin America

   • David Pimentel
   • Mario Giampietro
   • Sandra G.F. Bukkens

   OriginalPaper Pages: 125 - 148

4. Population and Deforestation in Costa Rica

   • Luis Rosero-Bixby
   • Alberto Palloni

   OriginalPaper Pages: 149 - 185