"ExxonMobil has manufactured uncertainty about the human causes of global warming just as tobacco companies denied their product caused lung cancer," said Alden Meyer, the Union of Concerned Scientists' Director of Strategy and Policy. "A modest but effective investment has allowed the oil giant to fuel doubt about global warming to delay government action just as Big Tobacco did for over 40 years."

Smoke, Mirrors and Hot Air: How ExxonMobil Uses Big Tobacco's Tactics to "Manufacture Uncertainty" on Climate Change details how the oil company, like the tobacco industry in previous decades, has

- raised doubts about even the most indisputable scientific evidence - funded an array of front organizations to create the appearance of a broad platform for a tight-knit group of vocal climate change contrarians who misrepresent peer-reviewed scientific findings - attempted to portray its opposition to action as a positive quest for "sound science" rather than business self-interest - used its access to the Bush administration to block federal policies and shape government communications on global warming

ExxonMobil-funded organizations consist of an overlapping collection of individuals serving as staff, board members, and scientific advisors that publish and re-publish the works of a small group of climate change contrarians. The George C. Marshall Institute, for instance, which has received $630,000 from ExxonMobil, recently touted a book edited by Patrick Michaels, a long-time climate change contrarian who is affiliated with at least 11 organizations funded by ExxonMobil. Similarly, ExxonMobil funds a number of lesser-known groups such as the Annapolis Center for Science-Based Public Policy and Committee for a Constructive Tomorrow. Both groups promote the work of several climate change contrarians, including Sallie Baliunas, an astrophysicist who is affiliated with at least nine ExxonMobil-funded groups.

Baliunas is best known for a 2003 paper alleging the climate had not changed significantly in the past millennia that was rebutted by 13 scientists who stated she had misrepresented their work in her paper. This renunciation did not stop ExxonMobil-funded groups from continuing to promote the paper. Through methods such as these, ExxonMobil has been able to amplify and prop up work that has been discredited by reputable climate scientists.

"When one looks closely, ExxonMobil's underhanded strategy is as clear and indisputable as the scientific research it's meant to discredit," said Seth Shulman, an investigative journalist who wrote the UCS report. "The paper trail shows that, to serve its corporate interests, ExxonMobil has built a vast echo chamber of seemingly independent groups with the express purpose of spreading disinformation about global warming."

ExxonMobil has used the laudable goal of improving scientific understanding of global warming-under the guise of "sound science"-for the pernicious ends of delaying action to reduce heat-trapping emissions indefinitely. ExxonMobil also exerted unprecedented influence over U.S. policy on global warming, from successfully recommending the appointment of key personnel in the Bush administration to funding climate change deniers in Congress.

"As a scientist, I like to think that facts will prevail, and they do eventually," said Dr. James McCarthy, Alexander Agassiz Professor of Biological Oceanography at Harvard University and former chair of the Intergovernmental Panel on Climate Change's working group on climate change impacts. "It's shameful that ExxonMobil has sought to obscure the facts for so long when the future of our planet depends on the steps we take now and in the coming years."

The burning of oil and other fossil fuels results in additional atmospheric carbon dioxide that blankets the Earth and traps heat. The amount of CO2 in the atmosphere has increased greatly over the last century and global temperatures are rising as a result. Though solutions are available now that will cut global warming emissions while creating jobs, saving consumers money, and protecting our national security, ExxonMobil has manufactured confusion around climate change science, and these actions have helped to forestall meaningful action that could minimize the impacts of future climate change.

"ExxonMobil needs to be held accountable for its cynical disinformation campaign on global warming," said Meyer. "Consumers, shareholders and Congress should let the company know loud and clear that its behavior on this issue is unacceptable and must change."

Formed in 1969, the Union of Concerned Scientists is the leading science-based nonprofit working for a healthy environment and a safer world. UCS combines independent scientific research and citizen action to develop innovative, practical solutions and secure responsible changes in government policy, corporate practices, and consumer choices.

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