Wednesday, February 10, 2016

the physics of energy and the economy

ourfiniteworld |  There is a standard wrong belief about the physics of energy and the economy; it is the belief we can somehow train the economy to get along without much energy.

In this wrong view, the only physics that is truly relevant is the thermodynamics of oil fields and other types of energy deposits. All of these fields deplete if exploited over time. Furthermore, we know that there are a finite number of these fields. Thus, based on the Second Law of Thermodynamics, the amount of free energy we will have available in the future will tend to be less than today. This tendency will especially be true after the date when “peak oil” production is reached.

According to this wrong view of energy and the economy, all we need to do is design an economy that uses less energy. We can supposedly do this by increasing efficiency, and by changing the nature of the economy to use a greater proportion of services. If we also add renewables (even if they are expensive) the economy should be able to get along fine with very much less energy.

These wrong views are amazingly widespread. They seem to underlie the widespread hope that the world can reduce its fossil fuel use by 80% between now and 2050 without badly disturbing the economy. The book 2052: A Forecast for the Next 40 Years by Jorgen Randers seems to reflect these views. Even the “Stabilized World Model” presented in the 1972 book The Limits to Growth by Meadow et al. seems to be based on naive assumptions about how much reduction in energy consumption is possible without causing the economy to collapse.