Historian of science, Naomi Oreskes of UC San Diego, states: “Scientific knowledge is the intellectual and social consensus of affiliated experts based on the weight of available empirical evidence, and evaluated according to accepted methodologies. If we feel that a policy question deserves to be informed by scientific knowledge, then we have no choice but to ask, what is the consensus of experts on this matter.”
Climate change has been extensively researched and the overwhelming majority of climate scientists agree that the observed modern day global warming is unprecedented and is very likely caused by humans. The 2007 IPCC reports detail this widespread consensus. Although there is little serious debate between climate experts, many in the general public still think that these scientists are unsure about climate change and the role that humans have played in modern day global warming (Doran & Zimmerman, 2009). There are some reasons why the general public may be confused and they are not accidental.