hmmm...my car..or my stomach...hmmm

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wait..i don't have a car...

 

The Last Straw

Posted February 12, 2008

 

A new generation of biofuels turns out to be another environmental disaster

 

By George Monbiot. Published in the Guardian 12th February 2008

 

 

 

Now they might start sitting up. They wouldn’t listen to the environmentalists

or even the geologists. Can governments ignore the capitalists?

 

A report published last week by Citibank, and so far unremarked by the media,

proposes “genuine difficulties†in increasing the production of crude oil,

“particularly after 2012.â€(1) Though 175 big drilling projects will start in

the next four years, “the fear remains that most of this supply will be offset

by high levels of declineâ€. The oil industry has scoffed at the notion that

oil supplies might peak, but “recent evidence of failed production growth

would tend to shift the burden of proof onto the producersâ€, as they have been

unable to respond to the massive rise in prices. “Total global liquid

hydrocarbon production has essentially flatlined since mid 2005 at just north of

85 million barrels per day.â€

 

The issue is complicated, as ever, by the refusal of the OPEC cartel to raise

production. What has changed, Citi says, is that the non-OPEC countries can no

longer answer the price signal. Does this mean that oil production in these

nations has already peaked? If so, what do our governments intend to do?

 

Nine months ago, I asked the British government to send me its assessments of

global oil supply. The results astonished me: there weren’t any(2). Instead it

relied exclusively on one external source: a book published by the International

Energy Agency. The omission became stranger still when I read this book and

discovered that it was a crude polemic, dismissing those who questioned future

oil supplies as “doomsayers†without providing robust evidence to support

its conclusions(3). Though the members of OPEC have a powerful interest in

exaggerating their reserves in order to boost their quotas, the IEA relied on

their own assessments of future supply.

 

Last week I tried again, and I received the same response: “the Government

agrees with IEA analysis that global oil (and gas) reserves are sufficient to

sustain economic growth for the foreseeable future.â€(4) Perhaps it hasn’t

noticed that the IEA is now backtracking. The Financial Times says the agency

“has admitted that it has been paying insufficient attention to supply

bottlenecks as evidence mounts that oil is being discovered more slowly than

once expected … natural decline rates for discovered fields are a closely

guarded secret in the oil industry, and the IEA is concerned that the data it

currently holds is not accurate.â€(5) What if the data turns out to be wrong?

What if OPEC’s stated reserves are a pack of lies? What contingency plans has

the government made? Answer comes there none.

 

The European Commission, by contrast, does have a plan, and it’s a disaster.

It recognises that “the oil dependence of the transport sector … is one of

the most serious problems of insecurity in energy supply that the EU

facesâ€(6). Partly in order to diversify fuel supplies, partly to cut

greenhouse gas emissions, it has ordered the member states to ensure that by

2020 10% of the petroleum our cars burn must be replaced with biofuels. This

won’t solve peak oil, but it might at least put it into perspective by causing

an even bigger problem.

 

To be fair to the Commission, it has now acknowledged that biofuels are not a

green panacea. Its draft directive rules that they shouldn’t be produced by

destroying primary forests, ancient grasslands or wetlands, as this could cause

a net increase in greenhouse gas emissions. Nor should any biodiverse ecosystem

be damaged in order to grow them(7).

 

It sounds good, but there are three problems. If biofuels can’t be produced in

virgin habitats, they must be confined to existing agricultural land, which

means that every time we fill up the car we snatch food from people’s mouths.

This, in turn, raises the price of food, which encourages farmers to destroy

pristine habitats - primary forests, ancient grasslands, wetlands and the rest -

in order to grow it. We can congratulate ourselves on remaining morally pure,

but the impacts are the same. There is no way out of this: on a finite planet

with tight food supplies you either compete with the hungry or clear new land.

 

The third problem is that the Commission’s methodology has just been blown

apart by two new papers. Published in Science magazine, they calculate the total

carbon costs of biofuel production(8,9). When land clearance (caused either

directly or by the displacement of food crops) is taken into account, all the

major biofuels cause a massive increase in emissions.

 

Even the most productive source - sugarcane grown in the scrubby savannahs of

central Brazil - creates a carbon debt which takes 17 years to repay. As the

major carbon reductions must be made now, the net effect of this crop is to

exacerbate climate change. The worst source - palm oil displacing tropical

rainforest growing in peat - invokes a carbon debt of some 840 years. Even when

you produce ethanol from maize grown on “rested†arable land (which in the

EU is called set-aside and in the US is called conservation reserve), it takes

48 years to repay the carbon debt. The facts have changed. Will the policy

follow?

 

Many people believe there’s a way of avoiding these problems: by making

biofuels not from the crops themselves but from crop wastes. If transport fuel

can be manufactured from straw or grass or wood chips, there are no implications

for land use, and no danger of spreading hunger. Until recently I believed this

myself(10).

 

Unfortunately most agricultural “waste†is nothing of the kind. It is the

organic material which maintains the soil’s structure, nutrients and store of

carbon. A paper commissioned by the US government proposes that, to help meet

its biofuel targets, 75% of annual crop residues should be harvested(11).

According to a letter published in Science last year, removing crop residues can

increase the rate of soil erosion 100-fold(12). Our addiction to the car, in

other words, could lead to peak soil as well as peak oil(13).

 

Removing crop wastes means replacing the nutrients they contain with fertiliser,

which causes further greenhouse gas emissions. A recent paper by the Nobel

laureate Paul Crutzen suggests that emissions of nitrous oxide (a greenhouse gas

296 times more powerful than CO2) from nitrogen fertilisers wipe out all the

carbon savings biofuels produce, even before you take the changes in land use

into account(14). Growing special second generation crops, such as trees or

switchgrass, doesn’t solve the problem either: like other energy crops, they

displace both food production and carbon emissions. Growing switchgrass, one of

the new papers in Science shows, creates a carbon debt of 52 years(15). Some

people propose making second generation fuels from grass harvested in natural

meadows or from municipal waste, but it’s hard enough to produce them from

single feedstocks; far harder to manufacture them from a mixture. Apart from

used chip fat, there is no such thing as a sustainable biofuel.

 

All these convoluted solutions are designed to avoid a simpler one: reducing the

consumption of transport fuel. But that requires the use of a different

commodity. Global supplies of political courage appear, unfortunately, to have

peaked some time ago.

 

www.monbiot.com

 

References:

 

1. Citi, 4th February 2008. Industry Focus: Oil Companies - International.

 

2. See http://www.monbiot.com/archives/2007/05/29/what-if-the-oil-runs-out/

 

3. International Energy Agency, 2005. Resources to Reserves: Oil & Gas

Technologies for the Energy Markets of the Future. Available electronically at:

http://www.iea.org/textbase/nppdf/free/2005/oil_gas.pdf

 

4. Email from the Energy Desk, Department for Business, Enterprise and

Regulatory Reform, 8th February 2008.

 

5. Dino Mahtani, 26th December 2007. Oil watchdog reworks reserves forecasts.

The Financial Times.

 

6. Commission of the European Communities, 23rd January 2008.

Proposal for a Directive of the European Parliament and of the Council

on the promotion of the use of energy from renewable sources, p8.

http://ec.europa.eu/energy/climate_actions/doc/2008_res_directive_en.pdf

 

7. Commission of the European Communities, 23rd January 2008.

Proposal for a Directive of the European Parliament and of the Council

on the promotion of the use of energy from renewable sources, Article 15.

http://ec.europa.eu/energy/climate_actions/doc/2008_res_directive_en.pdf

 

8. Joseph Fargione, Jason Hill, David Tilman, Stephen Polasky, Peter Hawthorne,

7th February 2008. Land Clearing and the Biofuel Carbon Debt. Science. Doi

10.1126/science.1152747.

 

9. Timothy Searchinger, Ralph Heimlich, R. A. Houghton, Fengxia Dong, Amani

Elobeid, Jacinto Fabiosa, Simla Tokgoz, Dermot Hayes, Tun-Hsiang Yu, 7th

February 2008. Use of U.S. Croplands for Biofuels Increases Greenhouse Gases

Through Emissions from Land Use Change . Science. Doi 10.1126/science.1151861.

 

10. I am grateful to Jim Thomas from the ETC Group for putting me right.

 

11. US Department of Energy and US department of Agriculture, April 2005.

Biomass as Feedstock for a Bioenergy and Bioproducts Industry: the Technical

Feasibility of a Billion-Ton Annual Supply.

http://www1.eere.energy.gov/biomass/pdfs/final_billionton_vision_report2.pdf

 

12. David Pimentel and Rattan Lal, 17th August 2007. Letter: Biofuels and the

Environment. Science.

 

13. This term has been used by Alice Friedemann, 10th April 2007. Peak Soil: Why

cellulosic ethanol, biofuels are unsustainable and a threat to America.

http://www.culturechange.org/cms/index.php?option=com_content & task=view & id=107 & I\

temid=1

 

14. PJ Crutzen, AR Mosier, KA Smith and W Winiwarter, 1 August 2007. N2O release

from agro-biofuel production negates global warming reduction by replacing

fossil fuels. Atmospheric Chemistry and Physics Discussions 7, pp11191–11205.

http://www.atmos-chem-phys-discuss.net/7/11191/2007/acpd-7-11191-2007.pdf

 

15. Joseph Fargione et al, ibid.

 

http://www.monbiot.com/archives/2008/02/12/the-last-straw/

 

 

Real knowledge is to know the extent of one's ignorance.

Confucius