Andrew Dessler is a climate scientist who studies both the science and politics of climate change. He is a Professor of Atmospheric Sciences and holder of the Reta A. Haynes Chair in Geosciences at Texas A&M University. His scientific research revolves around climate feedbacks, in particular how water vapor and clouds act to amplify warming from the carbon dioxide that humans emit. During the last year of the Clinton Administration, he served as a Senior Policy Analyst in the White House Office of Science and Technology Policy. Based on his research and policy experience, he has authored two books on climate change: The science and politics of global climate change: A guide to the debate (Cambridge University Press, 3rd ed. 2019, co-written with Edward Parson), and Introduction to modern climate change (Cambridge University Press, 3rd ed. 2021). This latter book won the 2014 American Meteorological Society Louis J. Battan Author’s Award. Prior to his work on climate, his research focused on stratospheric photochemistry. He authored the book The chemistry and physics of stratospheric ozone (Academic Press, 2000) about his work on that subject.