If an energy source, such as oil back when the cost was $20 or $30 barrel, can produce a large amount of energy in the form it is needed with low inputs, it is likely to be a very profitable endeavor. Governments can tax it heavily (with severance taxes, royalties, rental for drilling rights, and other fees that are not necessarily called taxes). In many oil exporting countries, these oil-based revenues provide a large share of government revenues. The availability of cheap energy also allows inexpensive roads, bridges, pipelines, and schools to be built.
As we move to energy that requires more expensive inputs for extraction (such as the current $90+ barrel oil), these benefits are lost. The cost of roads, bridges, and pipelines escalates. It is this loss of a subsidy fromcheap fossil fuels that is significant part of what moves us toward financial collapse.
Renewable energy generally does not solve this problem. In fact, it can exacerbate the problem, because the cost of its inputs tend to be high and very “front-ended,” leading to a need for subsidies. What is really needed is a way to replace lost tax revenue, and a way to bring down the high cost of new bridges and roads–that is a way to get back to the cost structure we had when oil (and other fossil fuels) could be extracted cheaply.
The Way Resource Extraction Reaches Financial Limits
When a company decides to extract a resource such as oil, gold, or fresh water, it looks for the least expensive source available. After many years of extraction, the least expensive sources become depleted, and the company must move on to more expensive resources. It always looks like there are plenty of resources left; they are just increasingly expensive to extract. Eventually an extraction limit is reached; this limit is a pricelimit.