John Dernbach is a nationally and internationally recognized authority on sustainable development, climate change, and environmental law. He is the Emeritus Professor of Law at Widener University and the former Director of the Environmental Law and Sustainability Center. He has authored more than 50 articles for law reviews and peer-reviewed journals, and has authored, coauthored, or contributed chapters to more than 20 books. Most recently, he and Professor Michael Gerrard edited Legal Pathways to Deep Decarbonization in the United States (Environmental Law Institute Press 2019), a comprehensive assessment and description of more than 1,000 legal tools that could be used to reduce U.S. greenhouse gas emissions by at least 80% by 2050.