The purpose of this paper is to explore one of the more subtle problems facing the United States. The problem concerns retaining economic and political power In the face of decreasing self-sufficiency in natural resources and raw materials.

Ecosystem services and global trade of natural resources : an introduction / Thomas Koellner -- Global human dependence on ecosystem services / Jordan Levine and Kai M.A. Chan -- Economics of global trade and ecosystem services / David Zilberman -- International trade policies and ecosystem...