The sustainability debate has shown a deep confusion about the processes and systems which support life and humanity. The lack of conceptual tools to incorporate previously ignored environmental “givens” into calculations used by economists and decisionmakers is painfully obvious. There are no simple answers to the complex question of costs, benefits, and sustainability. However, there is a natural currency we can use to measure our interdependence on our environment and assist us to make sensible decisions about current and future action.
That currency is energy.