Water Wars
April 29, 2007
While the 20th century mostly saw wars being fought around energy sources, especially oil, there are already indications that the focus of conflicts in the coming century would be water. Contrary to popular belief, water is a finite resource, and increasing population coupled with Climate Change will ensure that demand goes higher even as resources keep depleting. We are already into the fourth year of the 21st century’s first Climate Change war — Darfur — and Julian Borger of the Guardian deserves credit for highlighting this fact. (More on the Darfur)
Less than a generation ago, Arabs and Africans coexisted peacefully and productively in Darfur, Sudan’s arid western province which is more than twice the size of the United Kingdom. African farmers had allowed Arab herders to graze their camels and goats on the land, and the livestock had fertilised the soil.
The coexistence was so natural, in fact, the tribes of Darfur did not even think of themselves as Arab or African…Only a few years ago, it was just nomads and farmers…
Something fundamental has changed in this part of Africa, and it happened within a generation. From a state of sectarian innocence in which the dividing line between Arab and African was meaningless, something made people pick sides, and hardened their new sense of identity into ethnic hatred, all in the past two decades. What changed, the evidence suggests, was the climate.
The current conflict began in 2003. It was triggered when Darfurians launched a revolt against the central government, which fought back by unleashing the Janjaweed.
But the real roots of the disaster stretch back to the mid-1980s when a ferocious drought and famine transformed Sudan and the whole Horn of Africa. It killed more than a million people and laid waste livestock herds. Whether they maintained their way of life or tried to take up settled cultivation, the pastoralists of Darfur clashed repeatedly with its farmers. A string of conflicts broke out as both sides armed themselves, and those conflicts created the template for today’s disaster.
Alex de Waal, a researcher and writer on Darfur, tells the story of meeting a nomadic leader, Sheikh Hilal Musa, in 1985, at the height of the drought. The desert was visibly advancing as the Saharan winds blew sand into the more fertile hills where the sheikh’s clan, the Jalul, were grazing their camels. He tried hard to keep up appearances but it was clear his world was falling apart. Many Jalul who had lost their camels and goats tried their hands at farming, but as latecomers with no ancestral land rights, they had to make do with rocky semi-barren terrain, and could only look with envy towards the rich alluvial soil belonging to the long-established African tribe, an offshoot of the Fur people. Darfur means literally the Land of the Fur…
But Khartoum would never have found willing partners in Darfur if the conflict over land had not been made so acute by the drought. Tellingly, those Arab tribes who had land ownership rights - mostly in the south of Darfur - chose not to join the government’s counter-insurgency. Those who were prepared to kill, rape and pillage were drawn from the ranks of the desperate, ripped from their traditional way of life by a catastrophic change in the weather. Global warming created the dry tinder. Khartoum supplied the match.
Back in the 1980s, the failure of the rains was widely blamed on the people who lived in the region. Their over-grazing, it had been thought, had led to soil erosion, replaced green cover with bare rock and sand, reflecting more heat into the atmosphere and diminishing the chance of rain.
More recent computer modelling has suggested that rain patterns over Africa are influenced rather by ocean temperatures, and those in turn reflect global warming, and the rise of greenhouse gases in the atmosphere. In other words, droughts in Africa may be caused less by its hapless inhabitants and more by oversize cars and cheap flights in Europe and the US…
There is endless potential for more climate-driven conflicts all across the broad Sahel region that stretches from Sudan to Senegal, where the competition between herder and farmer is often reinforced by more entrenched tribal differences, as well as the fault line between Muslim and Christian. In decades to come, Darfur may be seen as one of the first true climate-change wars, and those wars to come may be every bit as vicious because the adversaries will be fighting for their lives in a suddenly unfamiliar world.
It is a doom-laden scenario but it is not inevitable. Most scientists agree that climate change, of one degree or another, will happen, and that it will diminish the amount of fertile arable land and pasture across vulnerable regions like the Sahel. What is not inevitable is the descent from competition to armed conflict. That is a political leap. It requires that national governments choose to exacerbate conflicts rather than resolve them, and it requires that the international community fails to act when national governments do not protect their own citizens.
“The real problem here is moral, it is not a question of climate,” Said Ibrahim Mustafa, the sultan of the Chadian border region of Dar Sila, says. “It’s not just a lack of water that makes a man kill his brother.”
At the moment, people such as Mustafa are losing the battle. After criticising the N’Djamena government for handing out guns rather than attempting to defuse border tensions with Sudan, he was obliged to hand over formal authority to his less outspoken son…
The rebels and the government came close to a deal last year but by the time a deadline for the negotiations expired, only one rebel faction had accepted the terms Khartoum was offering. The Darfur groups are in disarray, but if they were to reassemble around a common platform they may find Khartoum - facing mounting sanctions - willing to make a better deal…
There are ways that Darfur’s tragedy can be contained and mitigated before its neighbours are pulled into the downward spiral. The alternative could be a chain of conflicts across the continent and beyond, in the struggle for survival on a changing planet.
Warmer, Warmer
April 19, 2007
My response to John Lanchester’s plug for nuclear energy is in the London Review of Books.
John Lanchester endorses James Lovelock’s enthusiasm for nuclear power (LRB, 22 March). I presume he feels, as Lovelock does, that nuclear waste is so safe he would be willing to store it in his garden shed. Perhaps he also finds ‘persuasive’ Lovelock’s claims that the death rates from cancer of Hiroshima survivors were lower than in comparable populations, and that Chernobyl killed only 45 people. Lanchester appears to have fallen for the PR campaign conducted by the nuclear industry and the Blair government over the past year. He overlooks the environmental costs of uranium mining, which will only increase as reserves are depleted and the industry is forced to rely on progressively lower-grade ore. He doesn’t tell us how we will dispose of nuclear waste, says very little about the risks associated with running nuclear power plants, and ignores the costs of decommissioning. Nor does he take into account the amount of money the industry has already taken from taxpayers in the form of state subsidies, money which could have been spent on developing less risky alternatives.
Muhammad Idrees Ahmad
Glasgow
Monbiot on Climate Change
April 11, 2007
The following exchange highlights the reason why I feel the primary qualification for making it in the mainstream media is for one’s head to be safely plugged up one’s rear.
Letter from George Monbiot to Hamish Mykura, 16th March 2007
Dear Hamish,
I deeply regret your attempt on the Today programme on Wednesday to use my programme for Dispatches as your justification for broadcasting Martin Durkin’s film The Great Global Warming Swindle.
I do so for three reasons.
1. You claimed that both programmes were commissioned as part of “a season of opinionated polemical films about global warming”. This is untrue, as I am sure you know. The films were commissioned quite separately, by different departments. The Great Global Warming Swindle must have been commissioned long before my programme. Neither I nor anyone else on the production team has ever been told that my programme was part of “a season of opinionated polemical films about global warming”, or that it would be in any way linked to The Great Global Warming Swindle. If I had been aware of this, I would have withdrawn my cooperation. If this claim reflects your general standards of honesty, it might explain how The Great Global Warming Swindle came to be broadcast.
2. I am also resentful of the association between my film and Martin Durkin’s. My film was subjected to a rigorous process of fact-checking. Any claim which would not stand up to rigorous academic scrutiny was dropped. The production team was determined to ensure that every part of the film was robust and unchallengeable, and were supported in this by Channel 4’s current affairs department. Somehow the same standards do not seem to have been applied by your department. Durkin’s film contained a number of fundamental errors, some of which, it seems, could only have been made deliberately. Some of the graphs had plainly been “modified” by the production team. He suggested that the cooling after the Second World War was unexplained by climate scientists, while in truth climate scientists know that it was caused by global dimming as a result of sulphate pollution. As one of the contributers to the programme, Professor Carl Wunsch, has pointed out, the film was “as close to pure propaganda as anything since World War Two”, while the way it used his remarks “comes close to fraud”. How dare you associate me with this?
3. You suggested that my film in some way “balances” Durkin’s. But my film was not about the science of climate change. It was about the policies arising from it. I was not asked to demonstrate that manmade climate change was taking place. Neither was Mark Dowd, whose film you also cited. I am sure you can tell the difference between a film about science and a film about policy.
I would like to ask you three questions:
A. Could you please give me a list of the programmes about climate change your department has broadcast over the past 10 years.
B. In your letter to the Guardian you state that “we are presenting a range of programmes on the environment, many of which have as their premise the influence of CO2 as a driver of climate change”. Could you please let me know what these programmes are, and whether any of them are devoted to explaining the science of climate change, as understood by the great majority of the world’s scientists?
C. Could you please tell me whether you or any other commissioner in your department possesses a science degree?
Yours Sincerely,
George Monbiot
Letter from Hamish Mykura to George Monbiot, 20th March 2007.
Dear George,
Thank you for this. I’m happy to respond to the points you raise.
Firstly on your general points, ‘The Great Global Warming Swindle’ was indeed commissioned as part of a season of polemical films about climate change. The others were your film and Mark Dowd’s ‘God is Green’. I discussed these films at an early stage with Dorothy Byrne and other colleagues. It is usual for Channel 4’s seasons to originate from different departments, for example our Adoption Season and Bloody Foreigners Season comprised programmes from the News and Current Affairs and Documentaries departments.
‘The Great Global Warming Swindle’ was subject to the same legal and editorial scrutiny as your film, which you agree is rigorous.
Carl Wunsch was not misrepresented or misled about the programme and our correpondence with him clearly establishes this.
On your specific questions
1. I do not have a list of climate change programmes covering ten years. However in the last two years Channel 4 transmitted ‘A World Without Water’ on the global scarcity of water supply, ‘The Year the Earth Went Wild’ on increasing climate and geological volatitlity, ‘The End of the World as we Know It’ which was Marcel Theroux’s essay on global warming, ‘Seven Days that Shook the Weathermen’ on the effects of climate change, ‘Britain’s Tornado’ on the increase in volatile weather in the UK, and ‘What would Jesus Drive’ on the debate over US fuel consumption.
2. Channel 4 announced to the press in January that the environment would form the focus of a range of different programmes and series in 2007. As well as the three polemics which deal with climate change, we announced the series ‘Dumped’ – in which participants see how well they can live on the household waste that we throw away every day; the series ‘River Cottage Market’ which addresses the concept of ‘food miles’ and offers practical solutions to using local produce. There was also the series ‘Animal Farm’, which is an investigation of the pros and cons of genetic modification.
3. My own PhD devises mathematical predictive equations to assess soil erosion and environmental impacts of rainforest clearance in the tropics. Regards
Hamish Mykura
Head of History, Science & Religion
Letter from George Monbiot to Hamish Mykura, 22nd March 2007.
Dear Hamish,
thank you for your reply.
On the first point, as this is news to those of us who made my film, I would be grateful if you could provide me with some evidence: some memos or publicity material, for example, which show that it was commissioned as part of “a season of opinionated polemical films about global warming”.
On the issue of editorial scrutiny, you are plain wrong. Every fact in my programme stood up to examination, and remains standing today. The film you commissioned, by contrast, was a concatenation of mistakes so evident that some of them could only have been made on purpose. Let me give you some examples:
1. “Volcanoes produce more CO2 each year than all the factories and cars and planes and other sources of man-made carbon dioxide put together.”
This is simply wrong, as the most basic fact-check would have established.
2. The closing statement was as follows: “There will still be people who believe that this is the end of the world. Particularly when you have, for example, uh, the chief scientist of the UK telling people that by the end of the century, the only inhabitable place on the Earth, will be the Antarctic and it may, humanity may survive, thanks to some breeding couples, who moved to the Antarctic, I mean this is hilarious, it would be hilarious actually, if, if, if it weren’t so sad.”
These are not the views of the chief scientist, Sir David King. They are the views of James Lovelock. Singer appears to have confused them. Again, even a cursory fact check would have established this.
3. Almost every graph in the film was manipulated. In some cases, the time-line was extended beyond the available data, in others the curve had been smoothed to the extent that it became misleading. It looks as if these instances were deliberate attempts to fit the data to the argument.
4. The credentials of several of the scientists in the film were inflated. The worst example is Tim Ball, who is described as “Professor Tim Ball, Department of Climatology, University of Winnipeg”. As far as I can discover, there is no Department of Climatology at the University of Winnipeg. In fact he was a Professor of Geography at that university from 1988 until he retired in 1996. He has not since held an official position there or at any other university. Nor has he been granted an emeritus professorship.
Then there are the distortions by omission:
5. There is the suggestion, for example, that the standard climate model cannot explain the relative cooling between the 1940s and the 1970s. Any reputable climate scientist could have pointed out that the mechanism – global dimming – is well known and consistent with the models.
6. There is the claim that as rising temperatures, as shown in the Antarctic ice cores, pre-date rises in CO2, CO2 cannot be a driver of climate change. Again, as I suspect both you and Durkin knew perfectly well, this too is explained by the models.
7. There is the deliberate evasion of the question of funding. The film asks the contributers who have NOT received funding from the oil industry whether or not they have, and they reply in the negative. It does not ask Fred Singer, who HAS received such funding. It claims that Pat Michaels came “under attack from climate campaigners” for “conduct[ing] research which was part funded by the coal industry”. In fact, as the most cursory check would have shown, he came under attack for acting as a paid advocate for the coal industry, without declaring his interests. If you want documentary evidence for this, I can send it to you. But, again, your fact checkers – if there were any – should have found it.
Who was the scientific adviser on this film? Who were the fact-checkers? What qualifications did they have?
As for Carl Wunsch, surely he is better placed to decide whether or not he has been misrepresented than you are? Anyone watching the film would have concluded – as I did when I first saw it – that Wunsch subscribed to its thesis that CO2 was not a driver of climate change. Can you tell me that this is not the impression it creates? In other words, what depths of intellectual dishonesty are you prepared to plumb in defending this film?
But the most shocking information in your email is contained in the last line. When I asked whether anyone in your department had a degree in science, I confidently expected that the answer would be no – this might have explained quite a lot. Some of the errors in the film might even have been understandable. But discovering that you have a PhD in maths/environmental science, I realise that you must have gone into this with your eyes open. You know what the scientific process involves. You know what science looks like. You must also know what scientific fraud looks like. You appear to have chosen fraud.
Yours Sincerely, George Monbiot.
Letter from Hamish Mykura to George Monbiot, 26th March 2007.
Dear George,
Thank you for this.
With regard to the points you raise about the content of the programme ‘The Great Global Warming Swindle’, this film was subject to the same degree of editorial scrutiny as your programme ‘Greenwash’, which you yourself describe as ‘rigorous’. The film was indeed commissioned as one of several polemical films dealing with global warming issues in our season of films on the environment.
You question my decision to commission this film. However ‘The Great Global Warming Swindle’ represented the views of the significant minority of scientists and commentators who don’t subscribe to the view that anthropogenic CO2 is driving climate change. The very significant debate which the film has started is to be welcomed.
Regards, Hamish Mykura
Letter from George Monbiot to Hamish Mykura, 1st April 2007.
Dear Hamish,
Thank you for your message. I note with regret that you have not answered my questions; indeed that you have simply repeated the assertions made in your previous email, which I have already shown to be incorrect.
I listed seven evident and substantial “mistakes” made by The Great Global Warming Swindle. I could have listed several more. Your claim that it was “subject to the same degree of editorial scrutiny” as my programme, Greenwash, could be substantiated in one of only two ways. The first would be to show that Greenwash was also riddled with wildly misleading claims. I challenge you to name one respect – let alone seven – in which its assertions have been proved wrong.
The second would be to accept that the editorial scrutiny offered by your department is deficient. If it were true that The Great Global Warming Swindle was subject to rigorous scrutiny, then the people responsible for that scrutiny are in the wrong job. As you are ultimately responsible for ensuring that the programme was ready for transmission, that surely includes yourself. How many “mistakes” does a film have to make before you consider that it has NOT been subject to rigorous scrutiny?
I asked you in my last letter to justify your claim that both my film and Martin Durkin’s were commissioned as part of “a season of opinionated polemical films about global warming”. You have failed to do so. Why? If your claim were true, the evidence would surely not be hard to come by. Nor would it constitute a state secret. There is surely only one explanation for your failure to support this claim: you are unable to do so because it is untrue. If that is the case, then not only did the film you commissioned mislead its viewers on several substantial points of science, but you misled the listeners to the Today programme about the commissioning process. I will be forwarding our correspondence to the Today programme and asking that a correction be made.
Finally, you state that “the very significant debate which the film has started is to be welcomed”. You give yourself too much credit: the debate about whether or not anthropogenic global warming is happening was not started by the Great Global Warming Swindle. It has been taking place for over 20 years. Your film has indeed started a debate: about whether or not it was fit to be broadcast. I think your failure to provide credible responses to my questions answers that point.
Yours Sincerely,
George Monbiot
Global Warming and the Channel 4 Swindle
March 13, 2007
Sensationalism and controversy boosts ratings. No one knows this better than the folks at Channel 4. Having already milked the Big Brother controversy for all it was worth, they seek a rerun; this time by giving platform to the Climate Change Denial Industry to recycle discredited propaganda. A “documentary”, called The Great Global Warming Swindle, was given a prime time slot by the channel even though its Director has a history of misrepresentation and falsehoods. This film was no exception. One of the oceanographers appearing in the film has already protested that he was “seriously misrepresented”. George Monbiot unravels the rest of the nonsense peddled by Channel 4 in his column, “Don’t let truth stand in the way of a red-hot debunking of climate change“, in today’s Guardian.
Were it not for dissent, science, like politics, would have stayed in the Dark Ages. All the great heroes of the discipline – Galileo, Newton, Darwin, Einstein – took tremendous risks in confronting mainstream opinion. Today’s crank has often proved to be tomorrow’s visionary.
But the syllogism does not apply. Being a crank does not automatically make you a visionary. There is little prospect, for example, that Dr Mantombazana Tshabalala-Msimang, the South African health minister who has claimed that AIDS can be treated with garlic, lemon and beetroot, will one day be hailed as a genius. But the point is often confused. Professor David Bellamy, for example, while making the incorrect claim that wind farms do not have “any measurable effect” on total emissions of carbon dioxide, has compared himself to Galileo(1).
The problem with “The Great Global Warming Swindle”, which caused a sensation when it was broadcast on Channel 4 last week, is that to make its case it relies not on future visionaries, but on people whose findings have already been proved wrong. The implications could not be graver. Just as the British government launches its climate change bill and Gordon Brown and David Cameron start jostling to establish their green credentials, thousands of people have been misled into believing that there is no problem to address.
The film’s main contention is that the current increase in global temperatures is caused not by rising greenhouse gases, but by changes in the activity of the Sun. It is built around the discovery in 1991 by the Danish atmospheric physicist Dr Eigil Friis-Christensen that recent temperature variations on earth are in “strikingly good agreement” with the length of the cycle of sunspots(2).
Unfortunately, he found nothing of the kind. A paper published in the journal Eos in 2004 reveals that the “agreement” was the result of “incorrect handling of the physical data”(3). The real data for recent years show the opposite: that the length of the sunspot cycle has in fact declined, while temperatures have risen. When this error was exposed, Friis-Christensen and his co-author published a new paper, purporting to produce similar results(4). But this too turned out to be an artefact of mistakes they had made – in this case in their arithmetic(5).
So Friis-Christensen and another author developed yet another means of demonstrating that the Sun is responsible, claiming to have discovered a remarkable agreement between cosmic radiation influenced by the Sun and global cloud cover(6). This is the mechanism the film proposes for global warming. But, yet again, the method was exposed as faulty. They had been using satellite data which did not in fact measure global cloud cover. A paper in the Journal of Atmospheric and Solar-Terrestrial Physics shows that when the right data are used, a correlation is not found(7).
So the hypothesis changed again. Without acknowledging that his previous paper was wrong, Friis-Christensen’s co-author, Henrik Svensmark, declared that there was in fact a correlation – not with total cloud cover but with “low cloud cover”(8). This too turned out to be incorrect(9). Then, last year, Svensmark published a paper purporting to show that cosmic rays could form tiny particles in the atmosphere(10). Accompanying it was a press release which went way beyond the findings reported in the paper, claiming it showed that both past and current climate events are the result of cosmic rays(11).
As Dr Gavin Schmidt of NASA has shown on www.realclimate.org, five missing steps would have to be taken to justify the wild claims in the press release. “We’ve often criticised press releases that we felt gave misleading impressions of the underlying work”, Schmidt says, “but this example is by far the most blatant extrapolation-beyond-reasonableness that we’ve seen.”(12) None of this seems to have troubled the programme makers, who report the cosmic ray theory as if it trounces all competing explanations.
The film also maintains that manmade global warming is disproved by conflicting temperature data. Professor John Christy speaks about the discrepancy he discovered between temperatures at the earth’s surface and temperatures in the troposphere (or lower atmosphere). But the programme fails to mention that in 2005 his data were proved wrong, by three papers in Science magazine(13,14,15).
Christy himself admitted last year that he was mistaken. He was one of the lead authors of a paper which states the opposite of what he says in the film. “Previously reported discrepancies between the amount of warming near the surface and higher in the atmosphere have been used to challenge the reliability of climate models and the reality of human-induced global warming. Specifically, surface data showed substantial global-average warming, while early versions of satellite and radiosonde data showed little or no warming above the surface. This significant discrepancy no longer exists because errors in the satellite and radiosonde data have been identified and corrected.”(16)
Until recently, when found to be wrong, scientists went quietly back to their labs to start again. Now, emboldened by the global denial industry, some of them, like the film makers, shriek “censorship!” This is the best example of manufactured victimhood I have ever come across. If you demonstrate that someone is wrong, you are now deemed to be silencing him.
But there is one scientist in the film whose work has not been debunked: the oceanographer Carl Wunsch. He appears to support the idea that increasing carbon dioxide is not responsible for rising global temperatures. Professor Wunsch says that he was “completely misrepresented” by the programme, and “totally misled” by the people who made it(17).
This is a familiar story to those who have followed the career of the director, Martin Durkin. In 1998 the Independent Television Commission found that, when making a similar series, he had “misled” his interviewees about “the content and purpose of the programmes”. Their views had been “distorted through selective editing”(18). Channel 4 had to make a prime-time apology…
But for the people who commissioned this film, all that counts is the sensation. Channel 4 has always had a problem with science. No one in its science unit appears to understand the difference between a peer-reviewed scientific paper and a clipping from the Daily Mail. It keeps commissioning people whose claims have been discredited – like Martin Durkin and a certain nutritionist of our acquaintance. But its failure to understand the scientific process just makes the job of whipping up a storm that much easier. The less true a programme is, the greater the controversy.
References:
1. David Bellamy, 14th August 2004. An ill wind blows for turbines. Letter to the Guardian.
2. Eigil Friis-Christensen and Knud Lassen, 1991. Length of the solar cycle: an indicator of solar activity closely associated with climate. Science, Vol 254, 698-700.
3. Paul Damon and Peter Laut, 2004. Pattern of Strange Errors Plagues Solar Activity and Terrestrial Climate Data. Eos, Vol. 85, No. 39.
4. Knud Lassen and Eigil Friis-Christensen, 2000. Reply to “Solar cycle lengths and climate: A reference revisited” by P. Laut and J.Gundermann. Journal of Geophysical Research Vol 105, No 27, 493-495.
5. Paul Damon and Peter Laut, ibid.
6. Henrik Svensmark and Eigil Friis-Christensen, 1997. Variation of cosmic ray flux and global cloud coverage: A missing link in solar-climate relationships. The Journal of Atmospheric and Solar-Terrestrial Physics, Vol 59, 1225-1232.
7. Peter Laut, 2003. Solar activity and terrestrial climate: an analysis of some purported correlations. Journal of Atmospheric and Solar-Terrestrial Physics Vol 65, 801-812.
8. Nigel Marsh and Henrik Svensmark, 2000. Low cloud properties influenced by cosmic rays. Physical Review Letters Vol 85, no 23. 5004-5007.
9. Paul Damon and Peter Laut, ibid.
10. Henrik Svensmark et al, 2007. Experimental evidence for the role of ions in particle nucleation under atmospheric conditions. Proceedings of the Royal Society Volume 463, Number 2078, 1364-5021.
11. Danish National Space centre, October 2006. Getting closer to the cosmic connection to climate.
http://spacecenter.dk/publications/press-releases/getting-closer-to-the-cosmic-connection-to-climate
12. Gavin Schmidt, 16th October 2006. Taking Cosmic Rays for a spin. http://www.realclimate.org/index.php/archives/2006/10/taking-cosmic-rays-for-a-spin/
13. Carl A. Mears and Frank J. Wentz, 2nd September 2005. The Effect of Diurnal Correction on Satellite-Derived Lower Tropospheric Temperature. Science. Vol 309, pp1548-1551.
14. B.D. Santer et al, 2nd September 2005. Amplification of Surface Temperature Trends and Variability in the Tropical Atmosphere. Science. Vol 309, pp1548-1551.
15. Steven J. Sherwood, John R. Lanzante and Cathryn L. Meyer, 2nd September 2005. Radiosonde Daytime Biases and Late-20th Century Warming. Science. Vol 309, pp1556-1559.
16. Tom Wigley et al, April 2006. Temperature Trends in the Lower Atmosphere – Understanding and Reconciling Differences: Executive Summary. The U.S. Climate Change Science Program.
http://www.climatescience.gov/Library/sap/sap1-1/finalreport/sap1-1-final-execsum.pdf
17. Geoffrey Lean, 11th March 2007. An inconvenient truth… for C4. Independent on Sunday.
18. Independent Television Commission, 1st April 1998. Channel 4 to apologise to four interviewees in “Against Nature” series. Press release.
