All movements that reject an overwhelming scientific consensus show 5 inevitable characteristics. They celebrate fake experts, cherry pick the data, argue using misrepresentation and logical fallacies, indulge in conspiracy theories, and demand impossible expectations of what research can deliver. These characteristics are seen in the movements that deny the scientific consensus on vaccination, HIV and AIDS and the link between smoking and cancer. They are also abundantly evident in the movement that denies the scientific consensus that humans are causing global warming. Industry and conservative groups have been attacking scientific consensus for decades. As far back as 1991, Western Fuels Association launched a $510,000 campaign to "reposition global warming as theory (not fact)" in the public perception. A memo from communications strategist Frank Luntz leaked in 2002 advised Republican politicians to "continue to make the lack of scientific certainty a primary issue in the debate." In a recent analysis of syndicated conservative opinion pieces spanning 2007 to 2010, the most popular myth was âthere is no consensusâ. While opponents of climate action have persistently sought to manufacture doubt, the scientific consensus on human-caused global warming has grown so robust, it now manifests itself in a number of ways. Scientific organisations of many types and nationalities endorse the consensus. Several surveys of the climate science community measure overwhelming agreement. A 2004 analysis of peer-reviewed research found zero papers rejecting the consensus. It's within this context that the Skeptical Science analysis finding 97% expert consensus on human-caused global warming has drawn an incredible amount of media attention. Hundreds of media stories documented our survey and results. Our team members participated in a number of interviews to discuss the paper, including on Al Jazeera, CNN, and ABC. President Obama even Tweeted about our results to his 31 million followers. The story has been so popular mainly because our results present a simple but critical message. There is a wide gap between the public perception and the reality of the expert consensus on human-caused global warming. Additionally, research has shown that perception of consensus is linked to support for climate policy. This is true along most of the ideological spectrum â when people are aware of the expert consensus on human-caused global warming, they are more likely to support taking action to solve the problem.