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Gail Tverberg

Gail Tverberg

Gail Tverberg is a writer and speaker about energy issues. She is especially known for her work with financial issues associated with peak oil. Prior…

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Why Current Methods to Combat Climate Change Don’t Work

World leaders seem to have their minds made up regarding what will fix world CO2 emissions problems. Their list includes taxes on gasoline consumption, more general carbon taxes, cap and trade programs, increased efficiency in automobiles, greater focus on renewables, and more natural gas usage.

Unfortunately, we live in a world economy with constrained oil supply. Because of this, the chosen approaches have a tendency to backfire if some countries fail to adopt them. But even if everyone adopted them, it is not at all clear that they would provide the promised benefits.

World Fossil Fuel CO2 Emissions 1
Figure 1. Actual world carbon dioxide emissions from fossil fuels, as shown in BP’s 2012 Statistical Review of World Energy. Fitted line is expected trend in emissions, based on actual trend in emissions from 1987-1997, equal to about 1.0% per year.

The Kyoto Protocol was adopted in 1997. If emissions had risen at the average rate that they did during the 1987 to 1997 period (about 1% per year), emissions in 2011 would be 18% lower than they actually were. While there were many other things going on at the same time, the much higher rise in emissions in recent years is not an encouraging sign.

The standard fixes don’t work for several reasons:

1. In an oil-supply constrained world, if a few countries reduce their oil consumption, the big impact is to leave more oil for the countries that don’t. Oil price may drop a tiny amount, but on a world-wide basis, pretty much the same amount of oil will be extracted, and nearly all of it will be consumed.

2. Unless there is a high tax on imported products made with fossil fuels, the big impact of a carbon tax is to send manufacturing to countries without a carbon tax, such as China and India. These countries are likely to use a far higher proportion of coal in their manufacturing than OECD countries would, and this change will tend to increase world CO2 emissions. Such a change will also tend to raise the standard of living of citizens in the countries adding manufacturing, further raising emissions. This change will also tend to reduce the number of jobs available in OECD countries.

3. The only time when increasing natural gas usage will actually reduce carbon dioxide emissions is if it replaces coal consumption. Otherwise it adds to carbon emissions, but at a lower rate than other fossil fuels, relative to the energy provided.

4. Substitutes for oil, including renewable fuels, are ways of increasing consumption of coal and natural gas over what they would be in the absence of renewable fuels, because they act as  add-ons to world oil supply, rather than as true substitutes for oil. Even in cases where they are theoretically more efficient, they still tend to raise carbon emissions in absolute terms, by raising the production of coal and natural gas needed to produce them.

It is really unfortunate that the standard fixes work the way they do, because many of the proposed fixes do have good points. For example, if oil supply is limited, available oil can be shared far more equitably if people drive small fuel-efficient vehicles. The balance sheet of an oil importing nation looks better if citizens of that nation conserve oil. But we are kidding ourselves if we think these fixes will actually do much to solve the world’s CO2 emissions problem.

If we really want to reduce world CO2 emissions, we need to look at reducing world population, reducing world trade, and making more “essential” goods and services locally.  It is doubtful that many countries will volunteer to use these approaches, however.  It seems likely that Nature will ultimately provide its own solution, perhaps working through high oil prices and weaknesses in the world financial system.

Elastic Versus Inelastic Supply

It seems to me that many bad decisions have been made because many economists have missed the point that crude oil supply tends to be very inelastic, while other fuels are fairly elastic. Let me explain.

Elastic supply is the usual situation for most goods. Plenty of the product is available, if the price is high enough. If there is a shortage, prices rise, and in not too long a time, the market is well-supplied again. If supply is elastic, if you or I use less of it, ultimately less of the product is produced.

Coal and natural gas usually are considered to be elastic in their supply. To some extent, they are still “extract it as you need it” products. Supply of natural gas liquids (often grouped with crude oil, but acting more like a gas, so it is less suitable as a transportation fuel) is also fairly elastic.

Crude oil is the one product that is in quite short supply, on a world-wide basis. Its supply doesn’t seem to increase by more than a tiny percentage, no matter how high the price rises. This is a situation of inelastic supply.

World Crude Oil Production & Fitted Growth 1
Figure 2. World crude oil production (including condensate) based primarily on US Energy Information Administration data, with trend lines fitted by the author.

Even though oil prices have been very high since 2005  (shown in Figure 3, below), the amount of crude oil has increased by only 0.1%  per year (Figure 2, above).

Historical Oil Prices in 2011
Figure 3. Historical average annual oil prices, (“Brent” or equivalent) in 2011$, from BP’s 2012 Statistical Review of World Energy.

In the case of oil, both supply and demand are quite inelastic. No matter how high the price, demand for oil doesn’t drop back by much. No matter how high the price of oil, world supply doesn’t rise very much, either.1

Related Article: World Bank: Leaders are Running out of Time on Climate Change

In a situation of inelastic supply, the usual actions a person might take appear to work when viewed on a local basis, but backfire on a world basis, if not everyone participates. When one country tries to conserve crude oil (whether through a carbon tax, gasoline tax, or higher automobile mileage requirement), it may reduce its own consumption, but there are still plenty of other buyers in the market for the oil that was saved. So the oil gets used by someone else, (perhaps at a tiny bit lower price), and world production and supply are virtually unchanged. Thus, a reduction in oil usage by an OECD country can translate to more oil consumption by China or India, and ultimately more development of all types by those countries.

Adding Substitutes Adds to Carbon Emissions

If we don’t have enough oil, to a limited extent substitutes are available. Because oil supply is inelastic, though, these substitutes really aren’t substitutes for world oil supply, they are “add ons,” and this is one source of our problem with increasing emissions.

What do we use to make the substitutes? Basically, natural gas and coal, and to a limited extent oil (because we can’t avoid using oil). The catch is, that to make the substitutes, we need to burn natural gas and coal more quickly than we would, if we didn’t make the oil substitutes. Since the supply of coal and natural gas is elastic, it is possible to pull them out of the ground more quickly. Thus, making the substitutes tends to increase carbon dioxide emissions over what they would have been, if we had never come up with the idea of substitutes.

The increased use of coal and natural gas is pretty clear, if a person thinks about coal-to-liquids or gas-to-liquids. Here, we need to first build the plants used in production, and then with each barrel of substitute made, we need to use more natural gas or coal. So it is very clear that we are extracting a lot of additional coal and natural gas, to make a relatively smaller amount of oil substitute. There is often a substantial need for water to make the process work as well, adding another stress on the system.

But the same issue comes up with biofuels, and with other renewables. These too, are add-ons to the world oil supply, not substitutes. While theoretically they might produce energy with less CO2 per unit than fossil fuel systems, in absolute terms they lead to natural gas and coal being pulled out of the ground more quickly, to be used in making fertilizer, electricity, concrete, and other inputs to renewables.2

Using More Biomass is Not a Fix Either

Twenty noted scientist published a paper in the journal Nature in June 2012 called Approaching a State Shift in the Earth’s Biosphere. This report indicates that humans have already converted as much as 43% of Earth’s land to urban or agricultural uses. In total, 20% to 40% of Earth’s primary productivity has been taken over by humans. The authors are concerned that we may now be reaching tipping points leading to a state shift (and thus, severe climate change), because of loss of ecosystem services as use of biological products increases. Simulations indicate that this tipping point may occur when as little as 50% of land use is disturbed. This tipping point may be even lower, if world-wide synergies take place.

Carbon Taxes and Competitiveness

Each country competes with others in the world market place. Adding a carbon tax makes products made by the local company less competitive in the world marketplace.  It also signals to potential coal users that the countries adopting the carbon taxes are willing to a leave a greater proportion of world coal exports to those who are not adopting the tax, thus helping to keep the cost of imported coal down.

Asian countries already have a competitive edge over OECD countries in terms of lower wages and lower fuel costs (because of their heavy coal mix), when it comes to manufacturing. Adding a carbon tax tends to add to the Asian competitive edge. This tends to shift production offshore, and with it, jobs.

China's Energy Consumption by Source 2
Figure 4. China’s energy consumption by source, based on BP’s Statistical Review of World Energy data.

China joined the World Trade Organization in 2001. Figure 4 shows clearly that its fuel consumption ramped up rapidly thereafter. It seems likely that the number of Chinese manufacturing jobs and spending on Chinese infrastructure increased at the same time.

Economists seem to have missed the serious worldwide deterioration in CO2 emissions in recent years by looking primarily at individual country indications, including CO2 emissions per unit of GDP. Unfortunately, this narrow view misses the big picture–that total CO2 emissions are rising, and that CO2 emissions relative to world GDP have stopped falling. (See my posts and Thoughts on why energy use and CO2 emissions are rising as fast as GDP. See also my Figure 1 at the top of the post.)

The Employment Connection

I have shown that in the US there is a close correlation between energy consumption and number of jobs. (For more information, including a look at older periods, see my post, The close tie between energy consumption, employment, and recession.)

US Number Employed v Energy Consumption 3
Figure 5. Employment is the total number employed at non-farm labor as reported by the US Census Bureau. Energy consumption is the total amount of energy of all types consumed (oil, coal, natural gas, nuclear, wind, etc.), in British Thermal Units (Btu), as reported by the US Energy Information Administration.

There are several reasons why a connection between energy consumption and the number of jobs is to be expected:

(1) The job itself in almost every situation requires energy, even if it is only electricity to operate computers, and fuel to heat and light buildings.

(2) Equally importantly, the salaries that employees earn allow them to buy goods that require the use of energy, such as a car or house. (“Energy demand” is what people canafford; jobs allow “demand” to rise.)

Related Article: The IPCC May Have Outlived its Usefulness - An Interview with Judith Curry

(3) The lowest salaried people can be expected to spend the highest proportion of their salaries on energy-related services (such as food, oil for commuting). The more wealthy spend their money on high priced goods and services, such as financial planning and designer clothing, that require much less energy per dollar of expenditure.

The thing I find concerning is the close timing between the ramp-up of Asian coal use and thus jobs using coal, and the drop-off of US employment as a percentage of US population, as illustrated in Figure 6 below. Arguably, the ramp up in world trade is just as important, but some aspects of programs that are intended to save CO2 emissions also seem to encourage world trade.

US Employment as % of Population 2
Figure 6. US Number Employed / Population, where US Number Employed is Total Non_Farm Workers from Current Employment Statistics of the Bureau of Labor Statistics and Population is US Resident Population from the US Census. 2012 is partial year estimate.

Of course, the US did not sign the Kyoto Protocol or enact a carbon tax, and it is its jobs that I show falling as a percentage of population. It is more that the CO2 solutions act as yet another way to encourage more international trade, and with it more “growth”, and  more CO2.


Nature’s Solution 

It is not clear to me that any solution to rising CO2 emissions is available, beyond what Nature provides.

One issue is that it is necessary to leave carbon in the ground for all time, not just to temporarily slow the rate of extraction, if the buildup of CO2 is to be stopped. I don’t see that there is any way that we can impose our will on people living 10 or 50 years from now. The Maximum Power Principle of H. T. Odum would seem to indicate that any species will make use of whatever energy sources are available to them, to the extent that it can. Even if we temporarily defeat this tendency with respect to human’s use of fossil fuels, I don’t see any way that we can defeat this tendency for the long term.

Nature provides that finite systems, such as the Earth, will cycle to new states of equilibrium over time, as conditions change. While we would like to defeat Earth’s tendency in this regard, it is not at all clear that we can. Part of this cycling to a new state is likely to be a change in climate. This is state-change reference in Nature article earlier.

A state change is a cause for concern to humans, but not necessarily to the Earth itself.  The Earth has moved from state to state many times in the last 4 billion years, and will continue to do so in the future. It seems likely that when a state-change occurs, different species that can make use of higher CO2 levels will become dominant, rather than humans.

A financial collapse related to high oil price may be part of Nature’s approach to moving to a new state. It could bring about a reduction in world trade and a scale back in CO2 emissions.3 The resulting change could be abrupt, and not to many people’s liking, since most will not be prepared for it.

Steps That Might Work to Slow CO2 Emissions

If we want to slow the rate of carbon extraction, it seems to me that we need to take the following steps:

(1) Reduce the world’s population, through one-child policies and universal access to family planning services. This step is necessary because rising population adds to demand. If we are to reduce demand, lower population needs to play a role.

(2) Change our emphasis to producing essential goods locally, rather than outsourcing them to parts of the world that are likely use coal to produce them. This will have a multiple benefits. It will (a) add local jobs, and (b) lead to less worldwide growth in coal usage, (c) add protection against the adverse impact of declining world oil supply, if this should happen in the not too distant future.

The costs of goods will likely be higher using this approach, leading to less “stuff” per person, but this, too, is part of reaching reduced CO2 emissions.

It is hard to see that the steps outlined above would be acceptable to world leaders or to the majority of world population. Thus, I am afraid we will end up falling back on Nature’s plan, discussed above.


[1] Michael Kumhof and Dirk Muir recently prepared a model of oil supply and demand (IMF working paper: Oil and the World Economy: Some Possible Futures). In it, they assume a long run price-elasticity of oil supply of 0.03, and remark that a paper by Benes and others indicates a range of 0.005 to 0.02 for this variable. The long term price elasticity of oil demand is assumed to be .08 in the Kumhof and Muir analysis.

[2] I would argue that standard EROEI measurements are defined too narrowly to give a true measure of the amount of energy used in making a particular substitute. For example, EROEI measures do not consider the energy costs associated with labor (even though workers spend their salaries on clothing, and commuting costs, and many other good and services that use fossil fuels), or with financing costs, or of indirect impacts like wear and tear on the roads by transporting corn for biofuel.

Other types of analysis have ways of dealing with this known shortfall. For example, when the number of jobs that a new employer can be expected to add to a community is evaluated, the usual approach seems to be to take the number of jobs that can be directly counted and multiply by three, to estimate the full impact. I would argue that with substitutes, some similar adjustment is needed. This adjustment which would act to increase the energy use associated with renewables, and reduce the EROEI. For example, the adjustment might divide directly calculated EROEI by three.

A calculation of the true net benefit of renewables also needs to recognize that nearly the full energy cost is paid up front, and only over time is recovered in energy production. When renewable production is growing rapidly, society tends to be in a long-term deficit position. Typically, it is only as growth slows that society reaches as net-positive energy position.

[3] The way that limited oil supply could interfere with world trade is as follows: High oil prices cause consumers to cut back on discretionary goods. This leads to layoffs in discretionary sectors of the economy, such as vacation travel. It also leads to secondary effects, such as debt defaults and lower housing prices. The financial effects “concentrate up” to governments of oil importing nations, because they receive less tax revenue from laid-off workers at the same time that they pay out more in unemployment benefits, stimulus, and bank bailouts. (We are already at this point.)

Eventually, countries will find that deficit spending is spiraling out of control. If countries raise taxes and cut benefits, this is likely to lead to more lay offs and debt defaults. One possible outcome is that citizens will become increasingly unhappy, and replace governments with new governments that repudiate old debt. The new governments may have difficulty establishing financial relationships with other governments, given that most are major debt defaulters. Such issues could reduce world trade substantially.

By. Gail Tverberg of Oilprice.com

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  • Expat on November 26 2012 said:
    "It is hard to see that the steps outlined above would be acceptable to world leaders or to the majority of world population." That's nicely put...diplomatic yet clear.

    Basically, world leaders would roast live babies to be re-elected or continue their nation's domination. Corporate leaders would roast the babies and then package and sell them to make a buck. 90% of the world's population has no clue what climate change is.

    Doomed! We're doomed, I tell you! And frankly, the galaxy and the universe would be better off if mankind never made it off planet Earth anyway.
  • Robert Callaghan on November 26 2012 said:
    We have to reduce emissions by 80% in 40 years to have snowball's chance in hell of avoiding hell on earth. Scientists say we can only put up 565 gigatons more of C02 and still remain safe, but scientists did not expect this much damage from the 0.8°C rise we got already, such as the arctic ice melting 100 years ahead of their projections, So we'll hit 565 gigatons in 16 years, but it's not like we can put 564 gigatons and proclaim we are still safe.

    Reality bites:

    Dr. Kevin Anderson is Deputy Director of the famous Tyndall Center. He made a speech recently where he informs us that thing are really worse than we can imagine. He says climate scientists are in a conspiracy alright, a conspiracy of silence about how bad thing really are. Listen if you dare.


    Germany is actually burning more coal.


    Even if the XL pipeline is shut down, all they have to do is to ship the tar sands by train with no hearings, environmental impact or presidential permission necessary.


    We are approaching a planetary state shift that when once started is unstoppable and irreversible. This is critical to our survival and is not about global warming.


    We are heating and acidifying the oceans faster than anything else in the last 300 million years. The last time the ocean heated and acidified any near the present rate it resulted in one of earth’s five mass extinction events.http://www.sciencenews.org/index.php/seek/type/article/offset/399/view/generic/id/341465/title/Calcium_offers_clues_in_mass_extinctionCap and Trade is a scam that only corporations and governments like, pure and simple. Tax at source, public electronic funds transfer without government or corporations. Cap'n Trade = certain failure.


    Green energy uses conflict minerals, dirty rare earths, dangerous solvents, lethal heavy metals and Chinese wage slaves. Batteries are expensive and dirty. All the promised jobs will only increase consumer demands. Green energy will not make enough of a difference in time.


    That's the good news. The bad news is that we are going to fix it. We are so thoroughly screwed, that it is only a matter of time until we try to modify the planet's climate itself. It's like letting kids play with dynamite.
  • Michael Kurilla on November 26 2012 said:
    As is typical of most articles discussing global warming, the focus is limited exclusively to methodlogies for reducing emissions. Attempts typically encompass economic, legal, and regulatory approaches (reducing the population is a creative twist; good luck with that). The problem is that they all involve placing restrictions on human activities either directly or indirectly and so induce at the least unintended feedback loops and at worst a strident backlash. Either way, impact is minimal.

    What is missed is that CO2 levels are the net of production (emissions) and natural removal. Removal of CO2 is always completely ignored as if CO2 were a deadend substance with nothing to do after entering the atmosphere. In reality, CO2 is being recycled constantly. The real solution to global warming will be to identify a business opportunity that requires atmospheric CO2 (which will essentially be free) as an input. Linking biomass to production of carbon based matter that has long term usage (rather than a short term function like burning or eating for energy) can provide the needed shift to tip the CO2 balance to a lower steady state. The problem up to now has been one of focusing only on energy production with an eye to lowering CO2 emissions.

    Think where we'd be if biomass, using sunlight as an energy input and CO2 as the source of structural backbones (like plants do naturally and we do now with plastics) were to replace a huge chunk of our petrochemical industry.
  • Alan Boswell on December 04 2012 said:
    Michael, you are right in principle but unfortunately we produce CO2 at a rate that is far beyond the capacity of the natural processes that remove CO2. Therefore the net of production (emissions) and natural removal is very heavily weighted towards production.

    Since we obtain energy by synthesising CO2 from carbon fuel and atmospheric oxygen, it follows that CO2 is a waste product that contains a minimal level of chemical energy. So a business opportunity that can use it is difficult to envisage but I admire your optimism on that point :)
  • Fee & Dividender on January 12 2013 said:
    Gail writes:

    (3) The lowest salaried people can be expected to spend the highest proportion of their salaries on energy-related services (such as food, oil for commuting). The more wealthy spend their money on high priced goods and services, such as financial planning and designer clothing, that require much less energy per dollar of expenditure.

    The first half is true, the second is untrue in my experience. I find that my carbon footprint is largely proportional to my household income. Wealthy people fly, live in big houses requiring more energy, have multiple vehicles that require energy to produce, have secondary dwellings to build, maintain and travel between, and eat more meat.

    Emphasizing population control over consumption control via education, or taxation, could be interpreted as a sign of an as-yet un-emancipated colonial identity, though I'm sure we agree on reproductive and vocational autonomy for women when they wish to have fewer children.

    The one child policy makes sense from a biological point of view, but I'd guess a carbon tax might be more marketable socially than that policy in the long run.

    As for climate science accounting, I'll take the scientific consensus of thirty four National Academies of Science over Judith Curry any day.

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