Sustainable Energy and Mineral Resource Extraction and Consumption—Can a Viable Biosphere Be Preserved?

Abstract

Modern societies have utilized fossil energy, water, and most other Earth materials at consumption rates far exceeding those of planetary replenishment. The well-known collapse of isolated island communities shows that overexploitation of the environment ultimately ends in disaster. It is now apparent that humanity must reach a steady-state stewardship of the Earth employing efficient, universal mineral resource recovery, recycling, substitution, dematerialization, and conservation. The goal of consumption of renewable resources at or below recharge rates and near-total recycling of non-renewable Earth materials can only be achieved employing universally available, inexpensive energy. However, the Second Law of Thermodynamics dictates that a part of the nonrenewable mineral resource base and most of the spent energy are irretrievably lost as entropy increase. Research-pioneered technological advances leading to the production and ubiquitous availability of environmentally benign, cheap energy will be required in order to reach the sustainable utilization of mineral resources. The principal, virtually unlimited, renewable energy sources appear to be solar and fusion power.