In addition to serving as Chief Scientist for The Nature Conservancy, Katharine Hayhoe is the Endowed Professor in Public Policy and Public Law and Paul W. Horn Distinguished Professor at Texas Tech University. She served as a lead author for the Second, Third, and Fourth US National Climate Assessment and hosts the PBS digital series Global Weirding. She is the Climate Ambassador for the World Evangelical Alliance and has been named one of Time’s “100 Most Influential People,” Fortune’s “50 Greatest Leaders,” and Foreign Policy’s “100 Leading Global Thinkers.” (Photo credit: Ashley Rodgers)