I love the discussion. It brought this thread back from the dead. But I could do with less personal invective. We are here to debate not slur. Thanks.
I think it is clear to most posters here that we do not have a readily available substitute to power our existing infrastructure as it is now being run without petroleum.
However, there are also many people who believe that our present economic system is in any case unsustainable due to the demands it currently places on our environment.
Whatever is unsustainable must end eventually. Perhaps that is a good thing for society in the run long. We can in any case strive to waste less without forfeiting our current very high standard of living as, let us say, measured by the UN Human Development Index, and not by the number of cars in our pots and chickens in our driveways.
That is not wealth, but conspicuous consumption. I am not going to tell anyone to power down, but I certainly do not have a problem if the economics of more expensive or scarce energy forces them to either.
It does seem to me that technological innovation is a push-pull dilemma. We have not fully explored the limits of alternative sources of energy, yet, because so far our rudimentary attempts have proven uneconomical in our current energy mix.
For all I know cellulosic ethanol using bio-mass may become far more efficient than current methods used to produce ethanol. This is both a source of food and fodder. So it really would represent an increase in productivity. Will it be enough? Enough for what? To run a system that many agree is unsustainable in the first place? Or enough to mitigate the transition to a new equilibrium without all that nasty rapid die-off stuff?
I certainly do not know, but Africa, for example, is a very big place for one. And secondly their development problems seem to be largely due to bureacracy, incompetence and corruption, and not due to some inherent lack of resources. They could make a large economic contribution to the world's fuel needs, and help themselves to economically develop, if the science of cellulosic ethanol is improved substantially. That is just one what if scenario. It may never come to pass. But we certainly will not know if we do not try.
I know for a fact that I can heat and light the house on our farm using far less natural gas or electric than we currently use. Some of those efficiency gains require upfront investments. When energy prices were low they did not seem worth it. But now the economics are changing. Geo-thermal being the most expensive technology at the moment, but the one with the highest payback over the life of the house as we already have hot water heating throughout.
UPDATE: on geothermal
Whiskey and Gunpowder Geothermal Energy Report
The house is already well-insulated, but it can none the less be improved. If worse comes to worse I will stack strawbales around the exterior and then plaster the outside walls. Especially on the north side. A good friend and neighbor of mine lives in a beautiful strawhouse that he built. Its warm and toasty. The building materials came out of his own fields. It isn't any hippy retreat, but a well-crafted home.
Pehaps a few naive examples, but the Internet was also a pipe dream once upon a time as well as everything else we have managed not just to invent, but to commercially develop and distribute on a global scale.
That is not to say that we, collectively, do not face very serious economic challenges. In some case we are still fighting ethnic wars and conflicts over ideology that make little sense. Never mind the resource wars that may happen. So we are really not even focussed on the problems ahead of us. But the sooner we get started the better. The alternative to the future is not much better.
UPDATE: climate change and conflict
$this->bbcode_second_pass_quote('', 'G')lobal warming is one of the most significant threats facing humankind, researchers warned, as they unveiled a study showing how climate changes in the past led to famine, wars and population declines.
The world's growing population may be unable to adequately adapt to ecological changes brought about by the expected rise in global temperatures, scientists in China, Hong Kong, the United States and Britain wrote in the journal Proceedings of the National Academy of Sciences.
I am always wary of the broad conclusions made by scientists with an axe to grind - or the Litany as Bjoern Lomborgabout calls it - of what might happen, but I suppose we have to at least assign a probability to these events occuring and then plan accordingly.