"We have to begin regarding Calories, Joules and Watts as the key currencies rather than the Dollar, Euro and Yen."
"At present, economics is the study of how people transform nature to meet their needs and it treats the exploitation of finite natural resources including energy, water, air, forests, arable land and oceans as externalities, which they are not. For example, we cannot pollute and damage natural ecosystems and their local communities ad infinitum without severe repercussions to their underlying sustainability."
"The current model of the disposable economy operates as a system for transforming low-entropy raw materials and energy into high-entropy toxic waste and unavailable energy, while providing society with interim goods and services and the temporary satisfaction that most deliver. Any such transformations in the economy mean that there will be less low-entropy materials and energy available for natural ecosystems. Mounting evidence of this conflict demonstrates the limits to our national, regional and global growth!"