Frankel, Carl.  In Earth's Company
Gabriola Island, BC VOR 1XO
ISBN 0865713804

Page XIV

Efficiency is one of the hallmarks of the well-run business, and the gratuitous exploitation of natural resources is wildly inefficient. The modern industrial system is no more than one percent efficient when all material and energy inputs are considered.

Given that industrial growth further removes the capacity of the Earth to support human welfare, future economic progress must be measured by a different relationship, the pursuit of resource productivity as opposed to labor productivity.

The question is no longer how much timber, soil, minerals, or water are required to create one unit of well-being in society. The new question is: how much prosperity can we create with each board foot of timber, each liter of pure water, each square meter of topsoil, each pound of copper?