by wisconsin_cur » Tue 21 Oct 2008, 03:33:33
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Care to explain that?
I went back and read the oildrum article from which you lifted the graph. The author's conclusions seemed relevant to this discussion.
$this->bbcode_second_pass_quote('', 'I')'ll now allow myself the liberty and eccentricity of reformulating the Olduvai Theory. After all, without doing this, it wouldn't be fun.
The Olduvai Theory sets the Electrical Civilization to the time frame where Energy per Capita is above 30% of its all time peak. In 2005 that was 12.522 boe/capita and we know this:
* We're at a plateau in Oil production, above any value predicted by any reasonable logistic model;
* Population is still increasing steadily;
* Peak Oil will highly likely arrive in the next 5 years (if it hasn't yet).
So we can assume that 2005 is very likely to be a peak year in Energy/Capita. Thirty percent of 12.522 is about 3.756, a value first crossed in 1950. In the Oil-driven world scenario this value is crossed again in 2044. I guess we can now reformulate the Olduvai Theory:
Electrical Civilization can be described by a single pulse waveform of duration X, as measured by average energy-use per person per year. If it turns out that Oil drives the production of energy from other sources, the life-expectancy of Electrical Civilization is less than one-hundred years: i.e., X < 100.
In case Oil isn't the driving force behind production from other energy sources, the life-expectancy of Electrical Civilization is greater than or equal to one-hundred years: i.e., X >= 100. In such case X will be limited by a yet to be assessed upper bound, set by the decline of other-than-oil finite energy sources: i.e., X < U.
Homework: find a value for U.
Conclusions: The Olduvai Theory shows us something very simple, without renewable energy sources our modern way of life will end some time in the future. I'm an optimist and I believe we can drive away from the road to Olduvai. We can do it by controlling population or by using other forms of energy like Solar and Wind. Of course Oil will be hard to replace, but maybe cellulosic ethanol or something like it can help us in the long run.
Duncan introduced a very important concept, energy per capita, a measure of our Civilization. It's something that let us get a better understanding of the place Energy has in our life, and how can it affect our Future. From the Olduvai Theory we learned that modeling resource depletion is also modeling population, and that there is a strong link between the two.