This past week, I gave a presentation to a group interested in a particular type of renewable energy–solar energy that is deployed in space, so it would provide electricity 24 hours per day. Their question was: how low does the production cost of electricity really need to be?
I gave them this two-fold answer:
1. We are hitting something similar to “Peak Oil” right now. The symptoms are the opposite of the ones that most people expected. There is a glut of supply, and prices are far below the cost of production. Many commodities besides oil are affected; these include natural gas, coal, iron ore, many metals, and many types of food. Our concern should be that low prices will bring down production, quite possibly for many commodities simultaneously. Perhaps the problem should be called “Limits to Growth,” rather than “Peak Oil,” because it is a different type of problem than most people expected.
2. The only theoretical solution would be to create a huge supply of renewable energy that would work in today’s devices. It would need to be cheap to produce and be available in the immediate future. Electricity would need to be produced for no more than four cents per kWh, and liquid fuels would need to be produced for less than $20 per barrel of oil equivalent. The low cost would need to be the result of very sparing use of resources, rather than the result of government subsidies.
Of course, we have many other problems associated with a finite world, including rising population, water limits, and climate change. For this reason, even a huge supply of very cheap renewable energy would not be a permanent solution. Continue reading
Economists have put together models of how an economy works, but these models were developed years ago, when the world economy was far from limits. These models may have been reasonably adequate when they were developed, but there is increasing evidence that they don’t work in an economy that is reaching limits. For example, my most recent post, “Why ‘supply and demand’ doesn’t work for oil,” showed that when the world is facing the rising cost of oil extraction, “supply and demand” doesn’t work in the expected way.
In order to figure out what really does happen, we need to consider findings from a variety of different fields, including biology, physics, systems analysis, finance, and the study of past economic collapses. Since I started studying the situation in 2005, I have had the privilege of meeting many people who work in areas related to this problem.
My own background is in mathematics and actuarial science. Actuarial projections, such as those that underlie pensions and long term care policies, are one place where historical assumptions are not likely to be accurate, if an economy is reaching limits. Because of this connection to actuarial work, I have a particular interest in the problem.
How Other Species Grow
We know that other species don’t amass wealth in the way humans do. However, the number of plants or animals of a given type can grow, at least within a range. Techniques that seem to be helpful for increasing the number of a given species include:
- Natural selection. With natural selection, all species have more offspring than needed to reproduce the parent. A species is able to continuously adapt to the changing environment because the best-adapted offspring tend to live.
- Cooperation. Individual cells within an organism cooperate in terms of the functions they perform. Cooperation also occurs among members of the same species, and among different species (symbiosis, parasites, hosts). In some cases, division of labor may occur (for example, bees, other social insects).
- Use of tools. Animals frequently use tools. Sometimes items such as rocks or logs are used directly. At other times, animals craft tools with their forepaws or beaks.