Lewis Ziska, PhD is a Plant Physiologist formerly with the USDA's Agricultural Research Service. Dr. Ziska has published over 100 peer-reviewed research articles related to climate change and rising carbon dioxide that address: agriculture and food security; invasive species; and plant biology and public health. Dr. Ziska was a contributor to the 2014 International Panel on Climate Change report (Food Security Chapter); the 2014 National Climate Assessment (Public Health Chapter); and most recently, The Impacts of Climate Change on Human Health in the United States: A Scientific Assessment. Prior to the USDA, Dr. Ziska was a Smithsonian fellow and later took up residence as the Project Leader for global climate change at the International Rice Research Institute in the Philippines. Dr. Ziska's work has been featured on CNN, MSNBC, CBS Nightly News, CBS' Sunday Morning, National Geographic, The New York Times, The Washington Post and The Wall Street Journal. His most recent book is: Agriculture, Climate Change and Food Security in the 21st Century: Our Daily Bread.