The science is not settled. Of course, Obama would call the 57% who have some level of skepticism 'flat-Earth society' members.
I used to think there was a consensus among government-funded certified climate scientists, but a better study by
VerheggenStrengers, Verheegen, and Vringer shows even that is not true. The “97% consensus” is now 43%.
Finally there is a decent survey on the topic, and it shows that less than half of what we would call “climate scientists” who research the topic and for the most part, publish in the peer reviewed literature, would agree with the IPCC’s main conclusions. Only 43% of climate scientists agree with the IPCC “95%” certainty.
More than 1800 international scientists studying various aspects of climate change (including climate physics, climate impacts, and mitigation) responded to the questionnaire. Some 6550 people were invited to participate in this survey, which took place in March and April 2012. Respondents were picked because they had authored articles with the key words ‘global warming’ and/or ‘global climate change’, covering the 1991–2011 period, via the Web of Science, or were included the climate scientist database assembled by Jim Prall, or just by a survey of peer reviewed climate science articles. Prall’s database includes some 200 names that have criticized mainstream science and about half had only published in “gray literature”. (But hey, the IPCC quoted rather a lot of gray literature itself. Donna LaFramboise found 5,587 non peer reviewed articles in AR4.)