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"Using responses from nearly 700 biophysical scientists," a new survey "finds that approximately 92 percent of them believe that human-caused climate change is really happening," according to the Washington Post (September 25, 2015), reporting on J. S. Carlton, Rebecca Perry-Hill, Matthew Huber, and Linda S. Prokopy's "The climate change consensus extends beyond climate scientists," published in Environmental Research Letters.
A new poll from the Associated Press and GfK asked (PDF) respondents not whether they agree or disagree, but how confident they are, about various claims about science. The Associated Press (April 21, 2014) summarized, "Americans have more skepticism than confidence in global warming, the age of the Earth and evolution and have the most trouble believing a Big Bang created the universe 13.8 billion years ago."
A new poll from the Pew Research Center and Smithsonian magazine offers a degree of insight into American scientific literacy on natural selection, the age of the earth, and climate change, although there were no questions directly addressing evolution in the sense of common ancestry or climate change in the sense of anthropogenic global warming.