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What Happens When The Oil Runs Out? | CollapseNet

What Happens When The Oil Runs Out? | CollapseNet.7-31-2013-king-hubbert

Summary of a lecture by Professor Chris Rhodes to the Conway Hall Ethical Society, Conway Hall, Red Lion Square, London. 11.00 am, Sunday July 28th, 2013.

The world supply of crude oil isn’t going to run out any time soon, and we will be producing oil for decades to come. However, what we won’t be doing is producing crude oil – petroleum – at the present rate of around 30 billion barrels per year. For a global civilization that is based almost entirely on a plentiful supply of cheap, crude oil, this is going to present some considerable challenges. If we look over a 40 year period, from 1965 to 2005, we see that by the end of it, humanity was using two and a half times as much oil, twice as much coal and three times as much natural gas, as at the start, and overall, around three times as much energy: this for a population that had “only” doubled. Hence our individual average carbon footprint had increased substantially – not, of course, that this increase in the use of energy, and all else, was by any means equally distributed across the globe.

 From the latest document that I can find – the B.P. Statistical Review – we see that the majority form of energy used by humans on earth is crude oil, accounting for 33% of our total, closely followed by coal at 30%: a figure that is rapidly catching up with oil, as coal is the principal and increasing source of energy in developing nations such as China and India. Natural gas follows in a close third place, at 24%; nuclear and hydroelectric power at 5-6% each; and the tiny fraction of our overall energy that comes from “renewables”, is just 1.6%. Thus, we are dependent on the fossil fuels for 87% of our energy. Now, such a comparison is almost misleading and naïve, because it tacitly presumes that if our oil supply becomes compromised, we can make a simple substitution for it using some other energy source.

However, this is not so readily done in practice, because oil is a particular and unique substance, having both a high energy content, and that it is readily refined into liquid fuels – effectively by distillation – to provide the petrol and diesel that runs practically all of the world’s transportation. Moreover, everything we depend upon – literally everything: food, materials, clothes, computers, mobile phones, pharmaceuticals etc. – for our daily existence is underpinned by a plentiful supply of cheap crude oil. So, the loss of this provision is going to have a profound, and shattering effect on human civilization.

In the “good old days”, e.g. the Humphrey Jones “Giant Gusher” drilled in Texas in 1922, it was necessary only to drill a hole in the ground to get oil. An oil well contains not only oil, but gas at high pressure, meaning that once the cap-rock that holds it all in place is broken, the oil is forced out in that familiar jet of black gold. The good old days indeed, because then it was necessary only to expend an amount of energy equal to that contained in one barrel of oil to recover a hundred barrels, which is like investing a pound and getting a return of a hundred pounds – a very good net profit. In 2013, the return is maybe twenty pounds or just three for extra-heavy oil, or for “oil” derived from tar sands, once it has been upgraded into liquid fuel.

Of greatest concern is how much oil is remaining. As noted, we currently use 30 billion barrels a year – 84 million barrels a day, or a thousand barrels every second. When it is trumpeted about some new and huge find of oil, e.g. the Tupi field off Brazil, thought to contain 8 billion barrels, in reality this is only enough to run the world for three months. Context should not be lost in these matters. The quality of the oil is also at issue. For example, much of the remaining oil is of the “heavy”, “sour” kind, meaning that it is not necessarily liquid at all, but bitumen, and contains relatively high levels of sulphur, necessitating complex and energy-intensive processing to get the sulphur out – which would otherwise be corrosive toward the steel used in the refinery – and to crack the heavier material into lighter fractions that can be used as fuel, or as feedstocks for industry.

So, it’s not just that we have got through much of our original bestowal of oil, but that what remains is of poorer quality – in other words, we have used-up most of the “good stuff”! Oil shale is not oil at all, but contains a material called “kerogen” which is a solid and needs to be heated to five hundred degrees Centigrade to break it down into a liquid form that in any way resembles what we normally think of as “oil”. So, when it is claimed that there are “three trillion barrels” of oil under America, really this is only to encourage voters and investors, because the actual Energy return on Energy Invested (EROEI) is so poor that there has been no serious commercial exploitation of oil shale to date, and probably there never will be.

Not only are we entirely dependent on crude oil for all our fuel and materials, but without cheap crude oil, and natural gas to make nitrogen fertilizers, we could grow no food. If we look at a field of soya beans being harvested in Brazil, we see a number of features. For one, those beans are not consumed at source, but are transported around Brazil and around the world. So, oil-derived fuels are necessary not only to run the tractors and combine harvesters, but the trucks, ships and planes to move the crop onto the world markets. In addition, we see the vast clouds of dust being thrown up behind the marching array of mighty machines – combine harvesters – which represents the loss of top-soil.

Even if we could solve all our energy problems, we are consuming the living and fragile portion of the earth’s surface that is our soil, and upon which we are utterly dependent to grow any food at all. We have “lost” around one third of our soil in the past half century – much of this through unsound and unsustainable agricultural practices – which does not bode well for the survival of a burgeoning human population. Another feature is that this land was once rain forest, which has been cleared to use the land for farming.

This is done either simply by setting fire to the forest, or by more exquisite means, such as taking a ship’s anchor chain, four hundred feet long – and if it is two inches in diameter, weighing five tonnes – then stringing it between two one hundred tonne tractors and simply driving over the terrain, so that the chain rips through everything that is there, tearing the trees out by their roots and destroying the structure of the soil in the process. The upshot is that the soil becomes unproductive within only a few years and so it is necessary to move on and do the same thing elsewhere.

In Britain we import about 40% of what we eat, and we use around 7 million tonnes of crude oil each year to fuel our food-chain. It can be said that we literally “eat oil”.

The concept of “Peak Oil” is due to Marion King Hubbert, a petroleum geologist working for the Shell Development Company in Texas, who predicted that oil production in America would peak in 1970. At that time, Texas was “awash” with oil – America being the world’s major oil-exporting nation then – and so no one took him seriously: but when in 1970, he was proved correct, Hubbert’s Peak entered the realm both of hard science and folklore. According to Hubbert, there is a 40 year lag between the year of peak discovery and that of peak production. If we apply this to the world situation, where global oil discovery peaked in 1965, we expect a global production in 2005. Indeed world production of oil has been on a flat line since 2005, and it is thought that we are at the production limit.

The price of oil has quadrupled in the past 10 years, reflecting the more strenuous efforts that are necessary to maintain production: deepwater drilling, fracking, tar sands, all of which have much lower energy returns than for conventional crude oil. Indeed, oil that is recovered from fracking costs about $105 a barrel to produce which until recently was more than it could be sold for. However, the price of oil is creeping up, and the industry is prepared to bear the loss for now, because it knows that the price of a barrel of oil will shortly rocket, and having cornered this “new” portion of the industry, will make big profits. Oil companies are not charities, after all. I emphasis the word “new” because fracking – properly called hydraulic fracturing – has been around since 1947: what is new is the combination of this technique with horizontal drilling, meaning that porous but impermeable rocks can be drilled-out laterally, then “fracked” to break them open thus releasing the oil or gas that they contain.

Fracking is a controversial matter, and there are grave concerns about groundwater contamination from the process. It is not only the fear that the chemicals that were originally present in the fracking fluid might migrate upward into the water table, but that other toxic materials, e.g. radon, that were confined safely within the natural prevailing geology, might be exhumed too. The Royal Society (U.K. equivalent of a national academy of sciences) has concluded that the procedure is safe, so long as it is strictly regulated, but how can this be guaranteed, when profits are the order of the day, and if the technology is to be employed across the world?

What too will become of the millions of gallons of contaminated water, injected under great pressure into the wells to fracture the rock, that remains? Will this be disposed of safely or simply left behind, potentially to leak into and contaminate the groundwater and the soil? This would be a tragic and cruel legacy for future generations.

Analyses made by both the International Energy Administration (IEA; effectively part of the U.S. Department of Energy) and its counterpart organisation, the Paris-based Energy Information Agency (EIA), concur that we will have lost around half our production of conventional crude oil by 2030. This is equivalent to four times the present output of Saudi Arabia, and it seems highly unlikely that this gap in supply can be filled from unconventional sources. Since we are entirely dependent on crude oil to fuel the world’s transportation, and looking at the amount of oil we are likely to be left with, we may conclude that it will be necessary to curb transportation by about 70% over the next 20 years.

This means the loss mainly of personalized transport and it is unfeasible that there will be 34 million electric cars in the U.K. (the current number of oil-fuelled cars) any time soon, and in reality, never. The only sensible means to move people around using electric power is by light rail and tramways, i.e. mass-transit systems.

If we can’t address the problem from the supply side we have to curb our demand. In the absence of cheap and widely accessible transport we will need to produce far more of our food and materials at the local level. Such a metamorphosis of human civilization from the global to the local, will be underpinned by building strong, resilient communities in which people share their skills and knowledge, to provide as much as possible at the local, grass-roots level. This is the underpinning philosophy of the growing network of Transition Towns. Frightening though all of this is, we may evolve into a happier and more fulfilling state of living than a perceived status quo, that in truth is all too rapidly running through our fingers.

By. Professor Chris Rhodes

 

Peak Oil responds, “The report of my death was an exaggeration.”

Peak Oil responds, “The report of my death was an exaggeration.”

my_tombstone

A recent post entitled The Welcome Death of Peak Oil by George Koch on the Ludwig von Mises Institute of Canada website begins with the following optimistic comment: “Improved technology and more efficiency mean North America could eventually become an oil exporter.” [i]   The author goes on to argue that technology has placed the theory of Peak Oil in its grave and that energy independence for North America is just around the corner. That Peak Oil is a mistaken and buried theory has been argued recently elsewhere,[ii] and the idea of North American energy independence is one that has been and continues to be widely disseminated by the corporate media, the oil industry, and investment firms.[iii] There is one significant problem, however. The statement is based on an unsound foundation.

The notion that hydraulic fracturing will result in American energy independence appears to have been debunked.[iv] In fact, just recently Faith Birol, president of the International Energy Administration, has stated that the increase in American oil production is simply a surge, not a revolution.[v]  To put it simply: the bold assertion of energy independence is predicated on early production numbers of shale oil wells; unfortunately, these production rates cannot be sustained for very long except through an exponential increase in the number of wells drilled.[vi] This only serves, however, to increase the speed at which the resource deposit is drawn-down, quickening the arrival of the day that the wells will no longer be economically viable. It is interesting to note that a number of companies have already lost money investing in shale oil and others are actively looking to get out of the business.[vii]

If an argument’s underlying foundation is faulty, then it is axiomatic that the conclusion drawn from it is also flawed. To paraphrase that classic movie, Monty Python and The Holy Grail, Peak Oil is ‘not quite dead yet’. In fact, I would argue that it is alive and as pertinent as ever, perhaps more so. I offer the following evidence to support that view.

While the American government was not interested in the topic of Peak Oil when Marion King Hubbert first proposed the model for petroleum resource depletion in 1948, by 1974, shortly after his prediction of US oil production peaking became reality, Hubbert was asked to provide written testimony to a Congressional committee writing the National Energy Conservation Policy Act as to the impact of Peak Oil on the monetary system.[viii] Jimmy Carter’s administration was driven by the concept of finite resources, creating the Department of Energy and prompting the president to present the issues in a televised speech in 1977.[ix]

More recently, the secretive National Energy Policy Development Group (NEPDG)–that was created only ten days after George Bush defeated Al Gore for the 2001 presidency and placed under the direct authority of Vice President Dick Cheney–brainstormed for ten meetings over an nine week period from January to May 2001 about Peak Oil and other energy security issues; issues that would significantly shape American government policies for the next few years. Although agendas and minutes of the meetings have been classified, seven pages were released after two lawsuits. These pages show that the group was reviewing how much oil remained in the world, where it was located, and who controlled it.[x] The public report from the NEPDG made dozens of recommendations based on the underlying belief that oil resources were finite and securing them were in the national interest of the United States.[xi]

The picture has not changed. The shale oil ‘boom’ is a short-term blip in a long-term trend that has been known to the American government for decades. The fact is the previous American administration perceived the issue of energy security as one requiring immediate response by all levels of government. I think most would acknowledge that the geopolitical tensions and military interactions in the Middle East over the last several decades have been centred upon one main objective: control of the oil and gas in the region. The idea of Peak Oil was very much driving American policy, especially foreign policy, less than a decade ago and it’s naïve to believe it is no longer a driving force in the current administration’s geopolitical strategising. Despite assurances and rhetoric, the current administration has not drawn down the number of military personnel in the Middle East and has actually become involved in additional conflicts in the region (e.g. Libya, Syria).[xii]

Leaving North America for the moment. It was only three years ago that the Future Analysis Branch of the Bundeswher Transformation Centre, a branch of the German military,[xiii] carried out its initial study for the German government’s Federal Ministry of Defence on the impact of Peak Oil.[xiv] As taken from the report’s Forward: “…the purpose of security-related future analysis is to acquire knowledge precociously and scientifically based in order to refine conceptual specifications and objectives without making predictions…[and] to enable the Federal Ministry of Defence to identify long-term issues with relevance to security policy at an early stage...” That Germany focused this branch’s first research on the topic of Peak Oil and its security implications speaks volumes as to the seriousness of finite oil resources and how they will impact the globe.

But back to the idea that Peak Oil is dead and buried. Here is what the report has to say: “It is a fact, however, that oil is finite and that there is a peak oil. Since this study is mainly focused on understanding cause-effect relations following such a peak oil situation, it is not necessary to specify a precise point in time…. Depending on the development of globally relevant factors, we cannot rule out that peak oil could have serious security policy implications within the review period of the 30-year investigation perspective” (emphasis added). So, the German military and the German Federal Defence Department not only believe that Peak Oil exists, but that the country must begin to prepare for the implications of Peak Oil sooner rather than later.

I think one has to take a step back in temporal perspective to get a good view of Peak Oil and to understand it and its implications for our global, industrial world. After about 200,000 years of low energy existence, humans happened upon a one-time windfall of energy-intensive resources and it has taken us less than two centuries to reach the production peak of this resource bonanza. On the way up the curve we have used the easy-to-retrieve and highest energy-return-on-energy-invested (EROEI) resources first, leaving us the less energy efficient (lower EROEI) and much more difficult-to-retrieve and expensive dregs; much of which may never get extracted.

Small ‘successes’, such as that of the American shale oil industry’s, are seen as minor deviations or perturbations in the long-term picture that emerges. For example, discoveries at Prudhoe Bay, Alaska, bumped up American oil production for a few years in the late 1970s and early 1980s but by the mid- to late-1980s the country resumed its journey down the Hubbert curve that began in 1970. The same pattern seems to be emerging with the ‘shale boom;’ a slight blip in the production numbers for a couple of years beginning in late 2009 and then it will be back to the downward slide of Hubbert’s Peak in the not-too-distant future.

alaska and shale

This is not just true of the U.S.. It is true of every oil-producing country. Peak Oil is factual and based upon geologic patterns observed in every finite resource extracted to date. In fact, M.K. Hubbert predated his work on petroleum resources by studying extraction rates for various minerals that mimic the Hubbert curve.[xv]

The implications of Peak Oil are sure to be extremely upsetting to many. They range from James Howard Kunstler and John Michael Greer’s argument that the transition from fossil fuels will be a rather gradual fall from grace that will take generations, with possible spits and spurts of crises[xvi], to Michael Ruppert’s more apocalyptic and quick-moving collapse scenario. The reality of it, however, cannot be denied. But denial, of course, is the first stage of the Kubler-Ross model, also known as the five stages of grief, that psychiatrist Elisabeth Kubler-Ross uses to argue that when faced with impending death or some other horrible fate, a person will experience a series of emotional stages: denial, anger, bargaining, depression and acceptance.[xvii]

We won’t know when we’ve actually passed the peak of the Hubbert Curve with respect to oil production except in retrospect, and there are not likely to be any apocalyptic scenarios emerging as a result when we do; the truth is we may have already passed the point–global production rates of conventional oil have not moved above the levels reached in 2005/06.[xviii] There are many who have learned to accept it as inevitable but there are also a great many people still in the denial stage about Peak Oil.

Until more people arrive at the last stage of acceptance, we are destined to hear and read more stories with the theme reflected in Koch’s post. That Peak Oil is dead, technology will continue to save the day, and it’s time to move along, there’s nothing to see here. Unfortunately, I believe that the longer we maintain policies based on a denial of its existence, the less likely we will be able to prepare ourselves adequately and the more dire of the consequences will emerge.

What will befall an energy-dependent society as it begins its trip down the global, post-peak curve of Hubbert’s model can only be imagined. Will it reflect the brutal world of the television show Revolution where the power grid has failed due to wayward nanites?[xix] While failure of the grid in this science fiction series is not the result of Peak Oil, grid failure is a real possibility in a post-Peak Oil world, as pointed out by Richard Duncan in his Olduvai Theory.[xx] Will there be a massive die-off of humans as some predict?[xxi] Nobody knows.

One thing is sure though.

Peak Oil is dead, long live Peak Oil.


[i] G. Koch. The Welcome Death of Peak Oil. http://mises.ca/posts/blog/the-welcome-death-of-peak-oil/. November 9, 2013.

[ii] R. Wile. Peak Oil is Dead. http://www.businessinsider.com/death-of-peak-oil-2013-3. March 29, 2013.

B. Walsh. The IEA Says Peak Oil is Dead. That’s Bad News for Climate Policy.

http://science.time.com/2013/05/15/the-iea-says-peak-oil-is-dead-thats-bad-news-for-climate-policy/. May 15, 2013.

D. Blockman. As Fracking Rises, Peak Oil Theory Slowly Dies. http://www.forbes.com/sites/davidblackmon/2013/07/16/as-fracking-rises-peak-oil-theory-slowly-dies/. July 16, 2013.

K. Smith. No Peak Oil Really is Dead.

http://www.forbes.com/sites/modeledbehavior/2013/07/17/no-peak-oil-really-is-dead/. July 17, 2013.

[iii] G. Smith. U.S. to Be Top Oil Producer by 2015 on Shale, IEA says.

http://www.bloomberg.com/news/2013-11-12/u-s-nears-energy-independence-by-2035-on-shale-boom-iea-says.html. November 12, 2013.

P. Domm. Ship, baby, ship! Calls come for U.S. to export oil. http://www.cnbc.com/id/101087815. October 4, 2013.

R. Plank. North American Energy Independence Now Possible. http://www.chron.com/business/energy/article/North-American-energy-independence-now-possible-4007354.php. November 4, 2012.

D. Burney and F.O. Hanson. Pipelines are the ticket to North American energy independence. http://www.theglobeandmail.com/globe-debate/pipelines-are-the-ticket-to-north-american-energy-independence/article8952216/. February 22, 2013.

C. Assis. North America energy independent by 2020, but still tied to markets: report. http://blogs.marketwatch.com/energy-ticker/2013/09/27/north-america-energy-independent-by-2020-but-still-tied-to-markets-report/. September 27, 2013

Wood Mackenzie Press Release. Wood Mackenzie: Global Geopolitics Reshaped by North American Energy Independence. http://www.woodmacresearch.com/cgi-bin/wmprod/portal/corp/corpPressDetail.jsp?oid=11572576. September 26, 2013.

S. Arsenault. U.S. could reclaim role as net energy exporter. http://www.aljazeera.com/indepth/features/2013/08/2013831142514713250.html. August 31, 2013.

[iv] W. Koch. Could fracking boom peter out sooner that DOE expects? http://www.usatoday.com/story/news/nation/2013/11/03/fracking-boom-bust-us-energy-independence/3328561/. November 3, 2013.

T. Whipple. The Peak Oil Crisis: The Shale Oil Bubble. http://www.resilience.org/stories/2013-10-30/the-peak-oil-crisis-the-shale-oil-bubble. October 30, 2013.

R. Heinberg. America’s natural gas revolution isn’t all it’s ‘fracked’ up to be. http://www.csmonitor.com/Commentary/Opinion/2013/1023/America-s-natural-gas-revolution-isn-t-all-it-s-fracked-up-to-be. October 23, 2013.

M. Mushalik. The U.S. will always remain a crude oil importer. http://www.resilience.org/stories/2013-10-31/us-will-always-remain-crude-oil-importer. October 31, 2013.

S. Kelly. Could California’s Shall Oil Boom Be Just a Mirage? http://www.desmogblog.com/2013/11/07/could-california-s-shale-oil-be-just-mirage. November 7, 2013.

M. Lardelli. The propaganda campaign against peaking fossil fuel production. http://www.resilience.org/stories/2013-11-05/the-propaganda-campaign-against-peaking-fossil-fuel-production. November 5, 2013.

J.D. Hughes. Drill, Baby, Drill: Can unconventional fuels usher in a new era of energy abundance? http://www.postcarbon.org/reports/DBD-report-FINAL.pdf. February 2013.

[v] K. Cobb. Will the real International Energy Agency please stand up? http://resourceinsights.blogspot.ca/2013/11/will-real-international-energy-agency.html/ November 16, 2013.

[vi] SRSrocco. The coming bust of the great Bakken Oil Field. http://srsroccoreport.com/the-coming-bust-of-the-great-bakken-oil-field/the-coming-bust-of-the-great-bakken-oil-field/. November 16, 2013.

M. Katusa. U.S. #1 in Oil: So Why Isn’t Gasoline $0.80 per Gallon? http://www.caseyresearch.com/cdd/us-1-in-oil-so-why-isnt-gasoline-0.80-per-gallon. October 29, 2013.

[vii] K. Sloan. What’s next for oil shale? http://thebusinesstimes.com/whats-next-for-oil-shale/. October 8, 2013.

G. Chazan. Shell write-down bad new for US shale.

http://www.ft.com/intl/cms/s/0/cf41cc36-fab2-11e2-87b9-00144feabdc0.html#axzz2jdcgNfoR. August 1, 2013.

G. Chazan. Peter Voser says he regrets Shell’s huge bet on US shale.

http://www.ft.com/intl/cms/s/0/e964a8a6-2c38-11e3-8b20-00144feab7de.html?siteedition=intl. October 6, 2013.

[viii] M. King Hubbert. On the Nature of Growth. http://www.hubbertpeak.com/hubbert/OnTheNatureOfGrowth.pdf. 1974.

[ix] J. Carter. Primary Resources: Proposed Energy Policy. http://www.pbs.org/wgbh/americanexperience/features/primary-resources/carter-energy/. April 18, 1977.

Miller Center, University of Virginia. Jimmy Carter. http://millercenter.org/president/carter/essays/biography/print.

[x] M. Ruppert. Collapse. http://www.imdb.com/title/tt1503769/. 2009.

Wikipedia. Energy Task Force. http://en.wikipedia.org/wiki/Energy_Task_Force

On the Issues. Dick Cheney on Energy and Oil. http://www.ontheissues.org/celeb/Dick_Cheney_Energy_+_Oil.htm.

Haliburton Watch. Energy Task Force. http://www.halliburtonwatch.org/about_hal/energytf.html.

Sourcewatch. Cheney Energy Task Force. http://www.sourcewatch.org/index.php?title=Cheney_Energy_Task_Force.

[xi] Report of the National Energy Policy Development Group: Reliable, Affordable, and Environmentally Sound Energy for America’s Future. http://www.gcrio.org/OnLnDoc/pdf/nep.pdf. May 2001.

[xii] T. Dokoupil. Who’s the War President? http://www.thedailybeast.com/articles/2011/08/05/president-obama-president-bush-and-the-march-of-u-s-soldiers-abroad-where-they-are-and-why.html. August 5, 2011.

D. Degraw. Obama Far Outdoes Bush in Escalating War–The Numbers Will Surprise You. http://www.alternet.org/story/144449/obama_far_outdoes_bush_in_escalating_war_–_the_numbers_will_surprise_you. December 8, 2009.

P. Woodward. More US troops deployed overseas under Obama than Bush. http://warincontext.org/2009/10/13/more-us-troops-deployed-overseas-under-obama-than-bush/. October 13, 2009.

[xiv] Future Analysis Branch, Bundeswher Transformation Centre. Peak Oil: Security policy implications of scarce resources. http://www.jpods.com/JPods/004Studies/PeakOil_StudyEN_GermanArmy.pdf. November 2010.

[xv] M. King Hubbert. Future Ore Supply and Geophysical Prospecting: Mineral Properties Now Entering a  New Epoch. http://www.hubbertpeak.com/hubbert/FutureOreSupply.pdf. January 1934.

[xvi] J.M. Greer. The Long Descent: A User’s Guide to the End of the Industrial Age. http://www.newsociety.com/Books/L/The-Long-Descent. 2008.

J.H. Kunstler. The Long Emergency: Surviving the Converging Catastrophes of the Twenty-First Century. http://www.amazon.ca/The-Long-Emergency-Catastrophes-Twenty-First/dp/0802142494. 2005.

[xviii] M. McDermott. IEA chart says conventional oil production peaked in 2006. http://www.treehugger.com/corporate-responsibility/iea-chart-says-conventional-oil-production-peaked-in-2006.html. November 11, 2010.

D. Biello. Has Petroleum Production Peaked, Ending the Era of Easy Oil?  http://www.scientificamerican.com/article.cfm?id=has-peak-oil-already-happened. January 25, 2012.

[xix] Wikipedia. Revolution (TV Series). http://en.wikipedia.org/wiki/Revolution_(TV_series).

[xx] R. Duncan. The Olduvai Theory. http://www.thesocialcontract.com/artman2/publish/tsc1602/article_1362.shtml. Winter 2005/06.

The Olduvai Theory: Terminal Decline Imminent. http://www.thesocialcontract.com/artman2/publish/tsc1602/article_1362.shtml. Spring 2007.

America: A Frog in the Kettle Slowly Coming to a Boil.

http://www.thesocialcontract.com/artman2/publish/tsc1602/article_1362.shtml. Fall 2007.

The Olduvai Theory: Towards Re-Equalizing the World Standard of Living. http://www.thesocialcontract.com/artman2/publish/tsc1602/article_1362.shtml. Summer 2009.

[xxi] M. Savinar. The Peak Oil and Die-Off. http://www.unicamp.br/fea/ortega/eco/traducao-DieOff.pdf

J. Siman. Speaking very gently about die-off. http://www.resilience.org/stories/2006-10-10/speaking-very-gently-about-die. October 10, 2006.

N. Hagens. Jay Hansen and Dieoff.org. http://www.theoildrum.com/story/2006/7/13/21018/2121. July 24, 2006.

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