Benoit Mayer is an Assistant Professor in the Faculty of Law at The Chinese University of Hong Kong, where he teaches international law and environmental law. His research on the international law on climate change has been published in leading journals including the European Journal of International Law, the Asian Journal of International Law, Transnational Environmental Law and Climatic Change.

1. Introduction; 2. The rationale for international action on climate change; 3. The UNFCCC regime, from Rio to Paris; 4. Relevant developments in other regimes; 5. Relevant norms of general international law; 6. Differentiation; 7. International action on climate change mitigation; 8. Flexibility mechanisms; 9. Geoengineering; 10. International action on climate change adaptation; 11. Loss and damage; 12. International support; 13. Ambition and compliance; 14. Adjudication; 15. Non-state actors; 16. International law in times of climate change.