THE ICJ’S ADVISORY OPINION ON CLIMATE CHANGE: A POSITIVE, YET SMALL, STEP FORWARD
Sažetak
The ICJ’s Advisory Opinion on the obligations of States in respect of climate change represents a pivotal moment in international environmental law. Being one of three recent decisions on this matter, the Opinion fits neatly within a growing body of jurisprudence aimed at compelling States to fulfill their internationally owed duties.
The Opinion clarifies that States have legal obligations from a panoply of legal instruments to mitigate, adapt and cooperate in regard to the adverse effects of climate change. A breach of these obligations constitutes an internationally wrongful act and triggers State responsibility. Additionally, the Court endorsed the 1.5°C temperature goal as a legally binding target.
While the Opinion is laudable in many respects, others could have been improved. These include the reluctance of the Court to give a definite answer on the rights of future generations and the question of continued statehood due to the permanent loss of territory due rising sea levels.
Reference
Bibliography
Shaw, M., 2021, International Law, Cambridge, Cambridge University Press.
Legislative Sources
UNGA Resolution 77/276, Request for an advisory opinion of the International Court of Justice on the obligations of States in respect of climate change, UN doc. A/RES/77/276 (29 March 2023).
Case Law
Arbitral Tribunal, Trail smelter case (United States v. Canada), Decision of 11 March 1941, United Nations, Reports of International Arbitral Awards, Vol. III.
ECtHR, Verein Klimaseniorinnen Schweiz and Others v. Switzerland, No. 53600/20, Judgment of 9 April 2024, [GC].
IACtHR, On the scope of the state obligations for responding to the climate emergency and human rights, Advisory Opinion of 20 May 2025, AO-32/25 214, p. 214.
ICJ, Certain Activities Carried Out by Nicaragua in the Border Area (Costa Rica v. Nicaragua), Judgment, ICJ Reports 2015, p. 665.
ICJ, Construction of a Road in Costa Rica Along the San Juan River (Nicaragua v. Costa Rica), Judgment, ICJ Reports 2015, p. 706.
ICJ, Corfu Channel (United Kingdom v. Albania), Judgment, ICJ Reports 1949, p. 4.
ICJ, Legality of the Threat or Use of Nuclear Weapons, Advisory Opinion, ICJ Reports 1996, p. 226.
ICJ, Obligations of States in respect of Climate Change, Advisory Opinion of 23 July 2025, General List No. 187.
ICJ, Obligations of States in respect of Climate Change, Advisory Opinion of 23 July 2025, Declaration of Judge Judge Tomka, General List No. 187.
ICJ, Obligations of States in respect of Climate Change, Advisory Opinion of 23 July 2025, Separate Opinion of Judge Aurescu, General List No. 187.
ICJ, Obligations of States in respect of Climate Change, Advisory Opinion of 23 July 2025, Separate Opinion of Judge Bhandari, General List No. 187.
ICJ, Obligations of States in respect of Climate Change, Advisory Opinion of 23 July 2025, Separate Opinion of Judge Sebutinde, General List No. 187.
ICJ, Obligations of States in respect of Climate Change, Advisory Opinion of 23 July 2025, General List No. 187, Verbatim Record 2024/40, 4 December 2024.
ICJ, Obligations of States in respect of Climate Change, Advisory Opinion of 23 July 2025, General List No. 187, Verbatim Record 2024/48, 10 December 2024.
ICJ, Obligations of States in respect of Climate Change, Advisory Opinion of 23 July 2025, General List No. 187, Verbatim Record 2024/35, 2 December 2024.
ICJ, Pulp Mills on the River Uruguay (Argentina v. Uruguay), Judgment, ICJ Reports 2010, p. 14.
ITLOS, Request for an Advisory Opinion submitted by the Commission of Small Island States on Climate Change and International Law, Advisory Opinion of 21 May 2024, Case No. 31, (Advisory Opinion on Climate Change and International Law), para. 441.
Internet Sources
Arato, J., Uriburu, J., 2025, Treaty and Custom in the ICJ’s Climate Change Opinion, EJIL: Talk!, 24 July, (https://www.ejiltalk.org/treaty-and-custom-in-the-icjs- climate-change-opinion, 14. 11. 2025).
Chan, I., 2025, Further Legal Consequences of Obligations Erga Omnes (Partes) in the ICJ Climate Change Advisory Opinion: Duty of Non-Recognition and Article 62 Intervention, Völkerrechtsblog, 28 October, (https://www.ejiltalk.org/ further-legal-consequences-of-obligations-erga-omnes-partes-in-the-icj-climate- change-advisory-opinion-duty-of-non-recognition-and-article-62-intervention, 14. 11. 2025).
Corneo, A., Scherer, J., 2025, Is Montevideo Sinking?, Verfassungsblog, 19 August, (https://verfassungsblog.de/montevideo-climate-statehood-icj, 18. 10. 2025).
Gehring, M., 2025, When Custom Binds All States: Reflections on Customary International Law in the ICJ Climate Advisory Opinion, Verfassungsblog, 15 Au- gust, (https://verfassungsblog.de/customary-law-icj-climate-advisory-opinion, 14. 11. 2025).
Heri, C., 2025, Human Rights in the ICJ’s Climate Opinion, Verfassungsblog, 1 August, (https://verfassungsblog.de/human-rights-in-the-icjs-climate-opinion, 18. 10. 2025).
Jantarasombat, P., Chan, I., 2025, ICJ Climate Change Advisory Opinion: Peoples and Individuals as Obligees, EJIL: Talk!, 17 October, (https://www.ejiltalk.org/ icj-climate-change-advisory-opinion-peoples-and-individuals-as-obligees, 18. 10. 2025).
Odermatt, J., 2025, What the Court Didn’t Say, Verfassungsblog, 30 July, (https:// verfassungsblog.de/what-the-court-didnt-say, 18. 10. 2025).
PALU, 2025, Request for an Advisory Opinion on the Human Rights Obligations of African States in Addressing the Climate Crisis, The Climate Litigation Database, (https://www.climatecasechart.com/documents/request-for-an-advi- sory-opinion-on-the-human-rights-obligations-of-african-states-in-addressing- the-climate-crisis-petition_68af, 20. 10. 2025).
Rao, M., 2025, Climate Displacement in the ICJ’s Advisory Opinion: Recognised but Not Resolved, Völkerrechtsblog, 11 August, (https://voelkerrechtsblog.org/cli- mate-displacement-in-the-icjs-advisory-opinion, 18. 10. 2025).
Riemer, L., 2026, A Single Paragraph’s Promise, Verfassungsblog, 26 July, (https:// verfassungsblog.de/icj-advisory-opinion-on-climate-change-human-displace- ment, 18. 10. 2025).
Schaugg, L., Jones, N., Qi, J., 2025, Historic International Court of Justice Opinion Confirms States’ Climate Obligations, International Institute for Sustainable Development, 28 July, (https://www.iisd.org/articles/deep-dive/icj-advisory-opin- ion-climate-change, 18. 10. 2025).
Spiegeleir, A. de, Rocha, A., 2025, Sea-Level Rise Reaches The Hague: Findings in Relation to the Law of the Sea in the ICJ’s Climate Change Advisory Opinion, Verfassungsblog, 4 August, (https://verfassungsblog.de/law-of-the-sea-in-the-icjs- climate-change-advisory-opinion, 14. 11. 2025).
Sulyok, K., 2025, On the Science-Coloured Glasses of the ICJ: Harmfulness, Wrongfulness, and Climate Accountability, Völkerrechtsblog, 6 August, (https:// voelkerrechtsblog.org/on-the-science-coloured-glasses-of-the-icj, 14. 11. 2025).
Syla, Z., Kent, A., 2025, Statehood in the Climate Crisis: The ICJ’s Climate Advisory Opinion and the Presumption of State Continuity, Verfassungsblog, 19 August, (https://verfassungsblog.de/statehood-in-the-climate-crisis, 14. 11. 2025).
Urs, P., 2025, Open the Floodgates: Standing for the Enforcement of Obligations Erga Omnes in the ICJ’s Advisory Opinion on Climate Change, CIL Dialogues, 11 August, (https://cil.nus.edu.sg/blogs/open-the-floodgates-standing-for-the-en- forcement-of-obligations-erga-omnes-in-the-icjs-advisory-opinion-on-climate- change, 18. 10. 2025).
