Katharine Hayhoe, 48, is an atmospheric scientist, professor and director of the Climate Center at Texas Tech University. She is also an author, speaker, recipient of the United Nations' Champion of the Earth award and co-founder of Science Moms, a new effort to engage mothers in climate change issues.
Q: You've said that the No. 1 predictor for whether we think that the climate is changing and its impacts are serious has nothing to do with how much we know about science, but simply where we fall on the political spectrum. How do you explain that?