1. School for the Future of Innovation in Society, Arizona State University, Tempe, Arizona 85287, USA
2. Faculty of Law, University of Calgary, Calgary, Alberta T2N 1N4, Canada
3. Institute for Science, Innovation and Society, University of Oxford, Oxford OX2 6PN, United Kingdom
4. Forum for Climate Engineering Assessment, American University, Washington, DC 20016, USA
5. Institute for Philosophy and Public Policy, George Mason University, Fairfax, Virginia 22030, USA
6. School of Environment, Enterprise and Development, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada;