A few references. More will be posted shortly.
Superb New Yorker piece about the Koch Brothers and their involvement with the far right.
That Proceedings of the National Academy of Science paper, which I mention in the strip, on the numbers of climate researchers who believe that science points to the truth of man made climate change, compared to those researchers who don't.
Excellent book that does what it says on the tin. Merchants of Doubt: How a Handful of Scientists Obscured the Truth on Issues from Tobacco Smoke to Global Warming, by Naomi Oreskes and Erik Conway.
NASA's climate change evidence page.
Wikipeadia entry on the the Fourth Assessment Report (AR4) of the United Nations Intergovernmental Panel on Climate Change (IPCC).
Scott Mandia's research into the media's deplorable Climategate coverage.