Andrew E. Dessler is a Professor in the Department of Atmospheric Sciences and holder of the Reta A. Haynes Chair in Geosciences at Texas A & M University. He received his Ph.D. in chemistry from Harvard University in 1994 and performed postdoctoral work at NASA Goddard Space Flight Center (1994–96). In 2000, he worked as a Senior Policy Analyst in the White House Office of Science and Technology Policy, where he collaborated with Edward A. Parson. Dessler's academic publications include two other books, including the award-winning textbook Introduction to Modern Climate Change (Cambridge, 2nd edition, 2015). He has also published extensively in the scientific literature on stratospheric ozone depletion and the physics of climate. Edward A. Parson is Dan and Rae Emmett Professor of Environmental Law at the University of California, Los Angeles. He studies international environmental law and policy and the role of science and technology in policy-making. Previously a professor at Harvard University and the University of Michigan, Parson has also worked and consulted for senior policy-making and science-advisory bodies in the United States, Canada, and internationally. He holds degrees in physics from the University of Toronto and in management science from the University of British Columbia, and a Ph.D. in Public Policy from Harvard University.