And so on, and so on. We’ve heard them all.

With that in mind, Marc Airhart with the University of Texas at Austin has developed a series of reports that track research conducted by climate scientists’ at the Jackson School of Geosciences on eight of the most common myths about climate change. All told, the reports provide an informed perspective on this important public policy debate.

People who dispute evidence of recent global warming sometimes point to two episodes in the past 1,000 years called the Little Ice Age and the Medieval Warm Period — times when northern hemisphere temperatures were higher or lower than average for decades or even centuries — as examples of internal variability, a kind of natural