Part I. Ethics and Philosophy: 1. Ethics, geoengineering and moral schizophrenia: what's the question? Stephen M. Gardiner; 2. The ethical foundations of climate engineering Clive Hamilton; 3. The psychological costs of geoengineering: why it may be hard to accept even if it works Gareth Davies; Part II. Law and Governance: 4. Geoengineering and climate management: from marginality to inevitability Jay Michaelson; 5. Climate engineering and the anthropocene era Lee Lane; 6. Political legitimacy in decisions about experiments in solar radiation management David R. Morrow, Robert E. Kopp and Michael Oppenheimer; 7. Geoengineering and the myth of unilateralism: pressures and prospects for international cooperation Joshua B. Horton; 8. International legal regimes and principles relevant to geoengineering Albert C. Lin; 9. Climate geoengineering: solar radiation management and its implications for intergenerational equity William C. G. Burns; 10. Ocean iron fertilization: science, law, and uncertainty Randall S. Abate; 11. Ocean iron fertilization: time to lift the research taboo Kerstin Güssow, Andreas Oschlies, Alexander Proelss, Katrin Rehdanz and Wilfried Rickels; 12. Remaking the world to save it: applying US environmental laws to climate engineering projects Tracy Hester.