Patrick A. Parenteau, formerly director of Vermont Law School's Environmental Law Center and of the Environmental and Natural Resources Law Clinic, is the professor of Law Emeritus at Vermont Law and Graduate School. Parenteau is recognized for his expertise regarding endangered species and biological diversity, water quality and wetlands, environmental policy and litigation, and climate change. The courses he currently teaches at Vermont Law School include Climate Change and the Law, Extinction and Climate Change, Water Quality and Environmental Litigation. John Dernbach is a professor of Law at Widener University. Dernbach is a nationally and internationally recognized authority on sustainable development, climate change and environmental law. He is the director of the Environmental Law and Sustainability Center, and brings his expertise into the classroom in courses on property, environmental law, international law and sustainability.