Exxon Mobil misled the public about the state of climate science and its implications. Available documents show a systematic, quantifiable discrepanc… - Naomi Oreskes

The merchants of doubt adopted the tobacco strategy and applied it to a variety of domains, including climate change. In our work, we showed that the primary motivation for their activities was not so much financial as ideological. These men were market fundamentalists. By that, we mean that they believed that nearly all problems were best addressed not by government, but by the marketplace. They believed this not so much for economic reasons as for political ones:they believed that government action in the marketplace—even to address a threat as serious as tobacco use, which killed (and still does kill) millions of people every year, or the destruction of stratospheric ozone, which threatened the very existence of life on Earth—that such action was a threat to freedom, as it served as a step on a slippery slope towards tyranny.

This message of scientific uncertainty has been reinforced by the public relations campaigns of certain corporations with a large stake in the issue. The most well known example is ExxonMobil, which in 2004 ran a highly visible advertising campaign on the op-ed page of the New York Times. Its carefully worded advertisements—written and formatted to look like newspaper columns and called op-ed pieces by ExxonMobil—suggested that climate science was far too uncertain to warrant action on it. One advertisement concluded that the uncertainties and complexities of climate and weather means that "there is an ongoing need to support scientific research to inform decisions and guide policies". Not many would argue with this commonsense conclusion. But our scientists have concluded that existing research warrants that decisions and policies be made today.

Then-Vice President George H. W. Bush ran for president of the United States pledging to combat the “greenhouse effect with the White House effect”. 1988 was also the year in which the world nations joined together to create the w:Intergovernmental Panel on Climate Change (IPCC) to provide a scientific basis for policy action. Fossil fuel corporations might have begun to take steps to limit the damages their products caused to the global environment.
Instead, leading investor-owned fossil fuel corporations, including ExxonMobil, Shell, and British Petroleum, created the Global Climate Coalition (GCC) to oppose greenhouse gas emission reduction policies. From 1989 to 2002, the GCC led an aggressive lobbying and advertising campaign aimed at achieving these goals by sowing doubt about the integrity of the IPCC and the scientific evidence that heat-trapping emissions from burning fossil fuels drive global warming. They worked successfully to prevent the United States from signing the Kyoto Protocol after it was negotiated in 1997. When the GCC disbanded, they stated that they had achieved their goals....
Between 1988 and 2005, ExxonMobil invested over $16 million in a network of front groups that spread misleading claims about climate science. It also exploited its close relationship with the administration of President George W. Bush to pressure the administration to remove top scientists from leadership roles in the IPCC and the US National Climate Assessment and to promote federal policies driving further reliance on fossil energy