From Reuters, three days ago:
“I still stand by that the science is not settled on man-made global warming,” Perry said while campaigning in the key early primary state of New Hampshire.
By the way of contrast, from the Preface to National Academy of Sciences, Advancing the Science of Climate Change (2010):
…there is a strong, credible body of evidence, based on multiple lines of research, documenting that climate is changing and that these changes are in large part caused by human activities. …