Center for the Study of Carbon Dioxide and Global Change (CO2Science)
The Center for the Study of Carbon Dioxide and Global Change is a 501(c)(3) non-profit organization based in Arizona run by a family of climate change skeptics including Craig D. Idso (Chairman and former President), his father Sherwood B. Idso (President), and his brother Keith E. Idso (Vice President).
Craig Idso founded the Center in January, 1998 with the purpose of “discovering and disseminating scientific information pertaining to the effects of atmospheric CO2 enrichment on climate and the biosphere.” Their website publishes a weekly issue of “CO2Science,” containing a “new editorial and reviews of five different peer-reviewed scientific journal articles relating to various aspects of the global change debate.” 
According to their website, the Center for the Study of Carbon Dioxide and Global Change “was created to disseminate factual reports and sound commentary on new developments in the world-wide scientific quest to determine the climatic and biological consequences of the ongoing rise in the air's CO2 content.” 
One of the Center's primary arguments is that more CO2 in the atmosphere is a “Powerful aerial fertilizer, directly enhancing the growth of almost all terrestrial plants and many aquatic plants as its atmospheric concentration rises.” The Center argues that while the earth has warmed “slightly,” there “is no compelling reason to believe that the rise in temperature was caused by the rise in CO2 [from man-made emissions].” 
Oil Industry Ties
In addition to receiving at least $100,000 from Exxon Mobil (See funding below), Mother Jones reports the Idso family has further ties to the energy industry. In the early 2000s, Craig Idso was the director of environmental science at Peabody Energy, the world's largest privately owned coal company. Craig and Keith Idso are both tied to the Western Fuels Association. In October, 1999, they assisted in publishing a report for the Greening Earth Society (a group funded and controlled by Western Fuels) titled “Forecasting World Food Supplies: The Impact of the Rising Atmospheric CO2 Concentration,” as Idso announced in a separate CO2 Science article. , 
In 2006, Craig Idso also incorporated Cenospheres.net Inc., a company serving the oilfield industry. According to the Arizona Corporation Commission, the company was dissolved in August, 2008. A similarly-named “Cenospheres LLC” was also incorporated in May of 2008 and run by Lance and Julene Idso until that corporation was dissolved in February of 2013. , 
In addition to publishing a weekly newsletter titled CO2Science, which attempts to “separate reality from rhetoric in the emotionally-charged debate that swirls around the subject of carbon dioxide and global change,” CO2 science is also a separate charity entity, with EIN 20-2778308, and a physical address of Gilbert, AZ 85297. The group was registered in 2006. , 
Their Mission statement reads as follows:
“THE CHARACTER OF AFFAIRS OF THE CORPORATION ARE: RESEARCH, WRITING, EDUCATION, AND THE PUBLICATION OF SCIENTIFIC INFORMATION PERTAINING TO THE EFFECTS OF EARTH'S RISING ATMOSPHERIC CO2 CONCENTRATION ON THE BIOSPHERE.”
In the tax year ending 2010, CO2 Science reported $10,184 in revenue, with $24,000 in expenses going directly to employee compensation. The only listed employee is Craig Idso, President, who is listed as having received $22,500 in compensation. Publicly available 990 documents are listed below.
Stance on Climate Change
“[T]here is no compelling reason to believe that the rise in temperature [since the Industrial Revolution] was caused by the rise in CO2. Furthermore, it is highly unlikely that future increases in the air's CO2 content will produce any global warming […] “Atmospheric CO2 enrichment brings growth and prosperity to man and nature alike.” 
“Suffice it to say for now, there is no compelling reason to believe there will necessarily be any global warming as a result of the activities of man, especially those activities that result in CO2 emissions to the atmosphere.” 
In Their Own Words
According to the Center's President, Sherwood Idso, “we never discuss our funding. Why? Because we believe that ideas about the way the world of nature operates should stand or fall on their own merits, irrespective of the source of support for the person or organization that produces them.” 
In 2009 Mother Jones quoted Sherwood Idso saying that fundraising is “so poor that I'm not earning anything,” he says. “Everything has to go to my son [Craig] to help him maintain himself and the five kids that he has now, and so we're just scraping by.” The Center's 2008 tax return showed that it entered 2009 with $445,000 in cash on-hand, and in the previous year had paid Sherwood Idso $50,000, Craig Idso $79,000, and Craig Idso's wife, M. Anne Idso, $52,000. It also made a $58,000 “scientific research” grant to CO2 Science. 
The following data has been compiled by the Conservative Transparency Project. Note that not all funding values have been verified by DeSmogBlog for accuracy.
|Donors Capital Fund2||$283,800|
|Sarah Scaife Foundation||$100,000|
|Lynde and Harry Bradley Foundation||$90,000|
Donors Capital Fund (DCF)/DonorsTrust Funding2
*Donor's Capital Fund (DCF) donated at least $283,800 between 2007 and 2009. DeSmogBlog reports that Donors Capital Fund and DonorsTrust have together handled over $479 million of “dark money” connected to skeptical of climate change. The group was called the “dark money ATM of the conservative movement” by Mother Jones magazine. , 
In his 2012 report, “Fake science, fakexperts, funny finances, free of tax 2” (PDF), John Mashey highlights the IRS statement (See the IRS's notes on “Governance Practices” in section 3, paragraph 3):
“Irrespective of size, a governing board should include independent members and should not be dominated by employees or others who are not, by their very nature, independent individuals because of family or businessrelationships.”
- Sherwood B. Idso (father) — President (since October 4, 2001)
- Craig D. Idso (son) — Chairman, Founder, Treasurer and former President 
- Keith Idso (son) — Vice President. 
- M. Ann Idso (Craig's wife) — Secretary
- Robert E. Ferguson — No title (also President of the Science and Public Policy Institute)
Scientific and Policy Advisors
- Donald G. Baker
- W. Dennis Clark
- Donald Paul Hodel — Founder and Director of “Summit Energy Group,” a consortium of energy and natural resource consulting companies. 
- Kirill Ya. Kondratyev
- Dmitri Mauquoy
- A. Alan Moghissi
- William E. Reifsnyder
- Paul Reiter
- Clinton H. Sheehan
- George H. Taylor
- Kenneth E.F. Watt
- Sylvan H. Wittwer
Nongovernmental International Panel on Climate Change (NIPCC) reports are sponsored by three organizations: Heartland Institute, the Science and Environmental Policy Project, and the Center for the Study of Carbon Dioxide and Global Change. Five iterations have been published so far, each running counter to the official reports released by the Intergovernmental Panel on Climate Change (IPCC):
- Climate Change Reconsidered II: Biological Impacts (31 March 2014) — PDF (8.93 MB)
- Climate Change Reconsidered II: Physical Science (17 September 2013) — PDF (14.78 MB)
- 2013 Chinese Translation (15 June 2013) — PDF (8.66 MB)
- 2011 Interim Report (25 August 2011) — PDF (8.05 MB)
- 2009 Report: Climate Change Reconsidered (2 June 2009) — PDF (7.6 MB)
Craig Idso leads the research and writing efforts of all the NIPCC publications, and also hosts the NIPCC “research archive site,” which now directs readers to view research directly on the CO2 Science website. His father, Sherwood Idso, has also regularly contributed to the publication. 
According to leaked documents from the Heartland Institute (See DeSmogBlog entry on Heartland), the Institute planned to pay Craig Idso $11,600 per month for his work on the NIPCC Project in 2012.
Skeptical Science has also done an in-depth analysis of the science behind the NIPCC report, and reports how the NIPCC report exclusively looks at the literature published by climate change skeptics, whereas the IPCC report looks at both “skeptics” and mainstream climate scientists. They also note that scientists contributing to the IPCC report were not paid for their efforts, whereas the Heartland Institute alone sent $460,000 to the lead authors and contributors to NIPCC reports from 2010 to 2013, with an overall budget of nearly $1.6 million. 
- There is little or no risk of increasing food insecurity due to global warming or rising atmospheric CO2 levels. Farmers and others who depend on rural livelihoods for income are benefitting from rising agricultural productivity throughout the world, including in parts of Asia and Africa where the need for increased food supplies is most critical. Rising temperatures and atmospheric CO2 levels play a key role in the realization of such benefits.
- “No changes in precipitation patterns, snow, monsoons, or river flows that might be considered harmful to human well-being or plants or wildlife have been observed that could be attributed to rising CO2 levels. What changes have been observed tend to be beneficial.”
- “Higher atmospheric CO2 concentrations benefit plant growth-promoting microorganisms that help land plants overcome drought conditions, a potentially negative aspect of future climate change. Continued atmospheric CO2 enrichment should prove to be a huge benefit to plants by directly enhancing their growth rates and water use efficiencies.”
- “There is no support for the model-based projection that precipitation in a warming world becomes more variable and intense. In fact, some observational data suggest just the opposite, and provide support for the proposition that precipitation responds more to cyclical variations in solar activity.”
A full list of report contributors is available here (.xls spreadsheet). NIPCC Contributors have included some of the highest-profile climate change skeptics from across the country, many lacking credentials directly related to the area of climate change on which they are commenting (see linked profiles below):
- Anthony Lupo
- Christopher Essex
- Christopher Monckton
- Cliff Ollier
- Craig D. Idso
- David Evans
- Dennis Avery
- Don Easterbrook
- Fred Goldberg
- Gary Sharp
- George Taylor
- Gerd Weber
- Hans Labohm
- Harrison Schmitt
- Howard Hayden
- Indur Goklany
- J. Scott Armstrong
- Joe Bastardi
- Joseph D'Aleo
- Joseph L. Bast
- Kenneth Haapala
- Kesten Green
- Larry Gould
- Madhav Khandekar
- Nicola Scafetta
- Paul Reiter
- Richard Alan Keen
- Richard Courtney
- Robert M. Carter
- Ross McKitrick
- Roy Spencer
- S. Fred Singer
- Sebastian Lüning
- Sherwood B. Idso
- Stewart Franks
- Timothy Ball
- Tom Segalstad
- Vincent Richard Gray
- William Gray
- William Kininmonth
- Willie Soon
- Zbigniew Jaworowski
September 16, 2015
The Heartland Institute interviewed Sherwood B. Idso, President of the Center for the Study of Carbon Dioxide and Global Change, about the impacts of rising CO2 emissions. According to Idso, increased emissions from using fossil fuels is greatly beneficial: 
“I have found if fossil fuel usage is not foolishly restricted in a misguided attempt to prevent climate change—previously referred to as global warming—the expected increase in anthropogenic CO2 emissions will significantly enhance the yields and water-use efficiencies of essentially all of the world’s food crops, allowing us to continue to feed the world’s growing population up to and far beyond the year 2050, when it is expected to peak out at approximately nine billion people, compared to today’s 7.2 billion.” 
September 15, 2015
In a response to Pope Francis's push for UN climate change goals and recent encyclical on the environment, The Federalist published an essay by Craig D. Idso, the founder of the Center for the Study of Carbon Dioxide and Global Change, where he supposedly “challenged the Pope’s claim that there is a 'solid scientific consensus' that human activities are causing a 'disturbing warming' of the climate,” the Breitbart reports. 
In his article, titled ”Pope Francis, Fossil Fuels Won’t Cause Armageddon,” Idso argues that there is no scientific consensus on climate change, and that “global warming could be good,” while “Taxing or regulating CO2 emissions is an unnecessary and detrimental policy option that should be shunned.” 
August 3, 2015
The Center for the Study of Carbon Dioxide and Global Change, which claims to be unbiased in its examination of the scientific literature, published an article titled “The President's Clean Power Plan is Built Upon a Pack of Lies.” 
Idso argues that, as hinted in the title, “President Obama's Clean Power Plan is built upon a pack of lies.” Idso bases this accusation on research compiled solely by the CO2 Science website, and “literally thousands of peer-reviewed scientific papers” that Idso claims to have either read or published, as well as the reports of the NIPCC (which has been debunked by Skeptical Science). Idso reiterates that CO2 is an “arial fertilizer” that will have “direct monetary benefits of atmospheric CO2 enrichment on global crop production.” 
July 7 - 9, 2015
“[They] in no way … reflect the economic reality of a properly conducted climate change [benefit-costs analysis].”
“When certain errors and omissions in the [FIWG’s] methodology and calculations are rectified, the projected benefits of ‘carbon’ are found to far outweigh their projected costs,” said Idso.
“No attempt was made by [FIWG] to calculate or even acknowledge the existence of multiple, well-established ‘carbon’ benefits,” said Idso. “In order to be valid, a benefit-cost analysis must examine and include not only the costs but any benefits as well. Such negligence and prejudicial imbalance is stunning. It is inexcusable. It is scientifically fraudulent. And it is borderline criminal.” 
June 26, 2015
The Center for the Study of Carbon Dioxide and Global Change published an article on CO2 Science titled “Atmospheric CO2 Enrichment: Boon or Bane of the Biosphere?” 
The article concludes:
“[T]he real-world effects of atmospheric CO2 enrichment are absolutely essential to enable us to adequately feed and sustain the human population of the planet that is expected to inhabit the earth a mere 35 years from now, while at the same time being able to enjoy better health and resultant longevity. Is not this the moral course we all should be pursuing?” 
March 25, 2015
CO2 Science promoted an Open Letter to Museums of Science and Natural History. The letter claims that abandoning fossil fuels “would not help the environment but would likely harm it.” 
Interestingly, the letter appears to have originated from a new organization titled the CO2 Coalition, which shares many of the views of the Center for the Study of Carbon Dioxide and Global Change. The new CO2 Coalition also included Craig Idso in its Board of Directors.
Patrick Moore, also a member of the CO2 Coalition's Board of Directors, posted to twitter that the Letter was created by the CO2 Coalition.
Craig Idso, Founder of the Center for the Study of Carbon Dioxide and Global Change, spoke at the December conference of the American Legislative Exchance Council (ALEC), InsideClimate News reports. 
“Instead of being shunned like the plague, the ongoing rise in atmospheric carbon dioxide should be welcomed with opened arms,” Idso said, according to the ALEC member who spoke to InsideClimate News. “Far from being a pollutant, [CO2] is better than being the best fertilizer ever invented because it is actually…food that sustains essentially all plants on a daily basis.”Carbon-reduction policies and actions “are unnecessary, unwise, and unwarranted,” Idso continued.
“ALEC is not a lobby; it is not a front group. It is much more powerful than that. Through the secretive meetings of the American Legislative Exchange Council, corporate lobbyists and state legislators vote as equals on ‘model bills’ to change our rights that often benefit the corporations’ bottom line at public expense. ALEC is a pay-to-play operation where corporations buy a seat and a vote on ‘task forces’ to advance their legislative wish lists and can get a tax break for donations, effectively passing these lobbying costs on to taxpayers.”
May 21 - 23, 2012
DeSmogBlog researched sponsors behind the conference and found they had collectively received a combined total of $67 Million in funding from ExxonMobil, Koch, and Scaife Family foundations. 
June 30 - July 1, 2011
The Center for the Study of Carbon Dioxide and Global Change was an official Co-Sponsor (PDF) of the Heartland Institute's Sixth International Conference on Climate Change (ICCC6) in Washington, DC. Craig Idso was also a speaker at the event. 
DeSmogBlog found that 17 of the 43 sponsors of the Heartland Institute's Sixth International Conference on Climate Change, including the Heartland Institute itself, had collectively received over $46 million from either Scaife Foundations, Koch Foundations, or ExxonMobil. 
The Center for the Study of Carbon Dioxide and Global Change worked with Tom Harris and the International Climate Science Coalition (ICSC) to produce a petition attempting to rebut an earlier letter written by 18 climate scientists to Members of Congress. 
The original, 18-scientist letter, urged “our elected leaders to work together to focus the nation on what the science is telling us, particularly with respect to impacts now occurring around the country.” 
The rebuttal letter organized by Harris and Idso refers to the 18 climate scientists as “climate alarmists” who “appear to be unaware of 'what is happening to our planet’s climate,' as well as the vast amount of research that has produced that knowledge.” 
May 16 - 18, 2010
The Center for the Study of Carbon Dioxide and Global Change was an official Co-Sponsor (PDF) of the Heartland Institute's Fourth International Conference on Climate Change (ICCC4). Craig D. Idso was also a speaker (PDF) at the conference. 
June 2, 2009
March 8-10, 2009
DeSmogBlog researched the funding behind Heartland's Second International Conference on Climate Change and found that sponsor organizations had received over $47 million in funding from energy companies and right-wing foundations, with 78% of that total coming from Scaife Family foundations. 
November 3, 2003
The Center for the Study of Carbon Dioxide and Global Change issued a report, “Enhanced or Impaired? Human Health in a CO2-Enriched Warmer World,” written by the “father-and-sons team of Sherwood, Craig and Keith Idso.”
The report “also describes a number of non-climatic effects of atmospheric CO2 enrichment that positively impact human health, including the concentration enhancement of various health-promoting constituents of food and medicinal plants.”
July 29, 2003
The Center for the Study of Carbon Dioxide and Global Change issued a report (PDF) that they claim “Debunks Claims of Warming-Induced Extinctions,” arguing that more carbon dioxide in the atmosphere would be beneficial because “Plants in a CO2-enriched atmosphere generally prefer warmer temperatures than they do when exposed to normal air.” 
CSCDGC regularly co-publishes “original papers” with the Science Public Policy Institute (SPPI). These joint reports do not appear to be peer-reviewed, often do not list author information, and only seem to be available on the SPPI and C02 Science websites. 
SPPI and CSCDGC have historically published multiple papers per month on topics like the supposed benefits of CO2 on crop growth, the supposed exaggeration of sea level rise, and that species are more adaptive to climate change than mainstream science has suggested. 
Many of the arguments presented in the SPPI papers appear at SkepticalScience's review of common “global warming and climate change myths.” Sample SPPI/CSCDGC papers are listed below. 
|Benefits of Atmospheric CO2 Enrichment on Maize||2015-12-29||Not Listed||“In summary, it seems fairly clear that as the air’s CO2 content continues to rise, and even if the climate of the world changes in the ways suggested by GCM calculations, maize plants will likely display greater rates of photosynthesis and biomass production, as well as reduced transpirational water losses and increased water-use efficiencies; and to top it all off, more areas of the world will likely become suitable for growing this important crop.”|
|Benefits of Atmospheric CO2 Enrichment on Tomato||2015-12-22||Not Listed||“Clearly, the evidence reveals that as the CO2 content of the air increases, tomato plants will likely display greater rates of photosynthesis and biomass production, which should consequently lead to greater fruit yields, even under stressful conditions of fungal infection and high soil salinity.”|
|2015-11-17||Not Listed||“As demonstrated here, for many species, ocean acidification will be a non-problem … and maybe even a blessing!”|
|Benefits of Atmospheric CO2 Enrichment on Sunflower||2015-11-04||Not Listed||“Thus, commercial growers of sunflower crops will likely experience enhanced yields as the atmospheric CO2 content continues to rise. “|
|2015-10-21||Not Listed||“[…] wheat growers can anticipate greater yields in the future, due to this beneficial effect of the rising atmospheric CO2 concentration.”|
|2015-10-14||Not Listed||“[…] marine life affairs pretty much deflates the catastrophic prognostications put forth by the IPCC with regard to the future of the planet’s corals”|
|Deserts: Are They Expanding or Shrinking?||2015-10-07||Not Listed||“As with most of the rest of the world, therefore, as global temperatures go, so also goes the greening of the Earth … driven directly by the ongoing rise in the air’s CO2 content, and possibly indirectly by warming-induced alterations in global precipitation patterns.”|
|The Response of Echinoderms to Ocean Acidification||2015-09-09||Not Listed||“[…] the impacts of ocean acidification on echinoderms may not be as bad as many initially thought. Indeed, for many echinoderm species, the impacts will likely be minimal, if not altogether positive.”|
|2015-09-02||Not Listed||“[…] even if the climate changes that are typically predicted to result from anticipated increases in the air's CO2 content were to materialize (which we very strongly doubt will happen), the concurrent rise in the air's CO2 concentration should more than compensate for any deleterious effects those changes in climate might otherwise have had on the growth and yield of peanuts. […] CO2 is not a pollutant; it is a pollution fighter that reduces the negative effects of true pollutants, such as ozone, and replaces them with positive effects that are of great worth to man and nature alike.”|
“[…] Earth's coccolithophores are well equipped to deal with whatever
degree of ocean acidification may yet be experienced by the world’s great water bodies.”
|Alpine Ecosystem Responses to Rising Temperature and Atmospheric CO2||2015-08-19||Not Listed||“[…] alpine species in many locations are responding in a positive manner to increasing temperature and atmospheric CO2 concentrations.”|
|Historic Trends in Global Sea Level||2015-07-29||Not Listed||
“[…] it would appear that real-world sea level rise has been far less
dramatic over the course of the Industrial Revolution than what has typically been claimed to be the case by the world's climate alarmists.”
|Antarctic Sea Ice Trends||2015-07-22||Not Listed||”[…] for some still-unproven reason, and despite the supposedly unprecedented ncreases in mean global air temperature and atmospheric CO2 concentration that the planet has experienced since the late 1970s, Antarctic sea ice extent has stubbornly refused to do what climate models say it should be doing, as it just keeps on growing.”|
|Effects of Ocean Acidification and Warming on Corals (Laboratory Studies)||2015-07-11||Not Listed||“[…] it is clear that many corals will not succumb to the presumed negative impacts of rising temperatures and ocean acidification. […] In fact, many coral species could well benefit from the warmer ocean temperatures and higher atmospheric CO2 concentrations predicted for the years and decades ahead.”|
|Interactive Effects of C02 and Salinity on Plant Growth||2015-07-15||Not Listed||“[…] barley – and many other crop plants as well –should continue to respond positively to continued increases in the air's CO2 content, even in situations where significant stresses may be present due to high soil salinity levels.”|
|Atmospheric C02 Enrichment: Boon or Bane of the Biosphere?||2015-06-26||Not Listed||Criticizes Pope Francis's position on climate change. The paper cites work by Craig Idso and the Center for the Study of Carbon Dioxide and Global Change, and describes how “many people” believe carbon dioxide as providing “aerial fertilization” and being a boon that would “avert the otherwise near certain food and water crises looming on the horizon.”|
|Climate Model Inadequacies (Sea Ice)||2015-06-15||Not Listed||Questions models suggesting dramatic reductions in Arctic Sea ice due to global warming.|
|Mammals in a CO2-Enriched and Warmer World||2015-04-27||Not Listed||Suggests global warming will result in increased biodiversity.|
|Effects of Ocean Acidification on Marine Crustaceans||2015-03-31||Not Listed||Puts forward a “much more optimistic viewpoint” on ocean acidification caused by global warming.|
|Health Effects of Hot vs. Cold Temperatures in Asia||2014-12-30||Not Listed||Suggests that global cooling is more dangerous than global warming.|
|Coral Reef Responses to Temperature and Stress: Thermal Adaptation||2014-12-23||Not Listed||Suggests that corals can adapt to increased global temperatures.|
|Response of Fish to Ocean Warming||2014-10-31||Not Listed||Presents supposed evidence”in opposition to the IPCC's point of view” and claims that global warming will not have net harm to marine species.|
|The Global Medieval Warm Period||2014-10-30||Not Listed||Suggests that the climate has been warmer in the past, and that this warming was “known to have had a largely beneficial impact on earth's plant and animal life.”|
- Science and Environmental Policy Project (SEPP) — Coordinated on NIPCC project.
- The Heartland Institute — Coordinated on NIPCC project.
- CO2 Science (EIN 20-2778308)
- Science and Public Policy Institute (SPPI) — John Mashey describes SPPI as a “Front” for the CSCDGC. 
- CO2 Coalition — Craig Idso is a member of the Board of Directors.
C. D. Idso and K. E. Idso. “Carbon Dioxide and Global Warming: Where We Stand on the Issue,” Center for the Study of Carbon Dioxide and Global Change, 1998. Archived October 2, 2015. WebCite URL: http://www.webcitation.org/6bzRRGbIR
Josh Harkinson. “No. 8: Center for the Study of Carbon Dioxide and Global Change (A.K.A. The Idso Family),” Mother Jones, December 4, 2009. Archived October 2, 2015. WebCite URL: http://www.webcitation.org/6bzQDDLSi
“CENOSPHERES.NET,INC.,” Arizona Corporate Commission, Archived Oct 2, 2011. File Number -1278591-0.
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Any Kroll. “Exposed: The Dark-Money ATM of the Conservative Movement,” Mother Jones, February 5, 2013. WebCite URL: http://www.webcitation.org/6bzNO1Qop
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“TO THE MUSEUMS OF SCIENCE AND NATURAL HISTORY – AN OPEN RESPONSE,”CO2 Science, April 16, 2015. Archived September 9, 2015.
Neela Banerjee. “What's Behind ALEC's Denial That It Denies Climate Change?“ InsideClimate News, April 14, 2015. Archived October 4, 2015. WebCite URL: http://www.webcitation.org/6c0zBFdFH
“Cosponsors,” 7th International Conference on Climate Change. Archived May 10, 2012.
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Sixth International Conference on Climate Change Conference Program (PDF), the Heartland Institute. Archived July 25, 2015. Archived .pdf on file at DeSmogBlog.
Brendan DeMelle. “Denial-a-Palooza 6: Heartland's Sixth International Conference on Climate Change, Courtesy of Koch, Scaife & Exxon,” DeSmogBlog, June 30, 2011.
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(Press Release). “Study Touts Health Benefits of CO2-Enriched Warmer World,” (PDF), Center for the Study of Carbon Dioxide and Global Change, November 3, 2003. Archived .pdf on file at DeSmogBlog.
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