copy-for-spanish-icj-ao_litigation-notes-digest_feb2026-2.0-fc3f7f8fe10f06a5.pdf

This guide, published by the Center for International Environmental Law (CIEL) in February 2026, provides structured 'Litigation Notes' to help lawyers integrate the findings of the International Court of Justice's (ICJ) July 23, 2025, Advisory Opinion (AO) on State obligations regarding climate change into current and future legal cases. The document breaks down the ICJ's conclusions into thematic areas, including government framework litigation, adaptation, remedies and reparations, the right to a healthy environment, corporate conduct, climate finance, speculative interventions, and regulatory backsliding. It aims to translate the ICJ's normative clarity into practical tools for promoting climate justice across national, regional, and international courts.

• The ICJ definitively established that 1.5°C is the primary temperature goal for limiting the increase in the global average temperature under the Paris Agreement.
• States are subject to a 'rigorous' due diligence standard when preparing their Nationally Determined Contributions (NDCs), meaning they must make every effort to ensure their NDCs reflect their 'highest possible ambition' to achieve the Agreement's goals.
• The ICJ clarified that NDCs are not merely procedural or aspirational; their substantive content is relevant for determining compliance, and successive NDCs must represent a progression in ambition over time.
• Under customary international law, States have an independent obligation to prevent significant damage to the climate system and the environment, regardless of whether they are party to climate treaties.
• The ICJ ruled that the human right to a clean, healthy, and sustainable environment is a binding norm of international law and is essential for the enjoyment of other human rights, such as the rights to life, health, and an adequate standard of living.
• States have legally binding obligations to support adaptation, including the requirement for Annex II developed countries to provide financial assistance to particularly vulnerable developing countries to cover adaptation costs.
• The ICJ determined that obligations under climate treaties and customary international law regarding the protection of the climate system are 'erga omnes' (owed to the international community as a whole), meaning any State can invoke responsibility for their breach.
• Failure to meet climate obligations can lead to a full range of legal consequences under the law of State responsibility, including obligations of cessation, non-repetition, and full reparation (restitution, indemnification, and/or satisfaction).
• States may be held internationally illicit if they fail to adopt adequate measures to protect the climate system, specifically mentioning the production, consumption, licensing, or subsidization of fossil fuels.
• The ICJ emphasized that the plurality of actors contributing to climate damage does not exempt individual States from responsibility, and it is scientifically possible to determine the total contribution of each State to global emissions.
• The principle of intergenerational equity requires States to consider the interests of future generations and the long-term repercussions of their conduct when approving and applying climate policies.
• The ICJ noted that the use of speculative technologies or carbon offsets may be incompatible with the duty of prevention if they delay the adoption of proven mitigation measures or introduce new risks to the environment and human rights.
• Regulatory backsliding—such as weakening emission standards or dismantling environmental impact assessment (EIA) requirements—can constitute an internationally illicit act if it breaches the State's obligation to prevent significant climate damage.

APA

Avila, L., Campos, M., Chowdhury, J., Dey, R., Dutta, R., Fournier, L., Alves, D. B. G., Lennon, E., Main-Klingst, L., Masiye-Moyo, N., Pfitzner, L., Reisch, N., Shetye, A., Slidders, C., Tan, F., Udell, J., & van Es, C. (2026). copy-for-spanish-icj-ao_litigation-notes-digest_feb2026-2.0-fc3f7f8fe10f06a5.pdf. Center for International Environmental Law. https://www.ciel.org/wp-content/uploads/2026/06/Copy-for-Spanish-ICJ-AO_Litigation-Notes-Digest_Feb2026-2.0.pdf

Chicago

Avila, Liliana, Mariana Campos, Joie Chowdhury, Riddhi Dey, Ritwick Dutta, Louise Fournier, Danilo B. Garrido Alves, et al. copy-for-spanish-icj-ao_litigation-notes-digest_feb2026-2.0-fc3f7f8fe10f06a5.pdf. Center for International Environmental Law, 2026. https://www.ciel.org/wp-content/uploads/2026/06/Copy-for-Spanish-ICJ-AO_Litigation-Notes-Digest_Feb2026-2.0.pdf.

Wikipedia

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BibTeX

@techreport{avila2026copyforspanishicjaolitigationnotesdigestfeb202620fc3f7f8fe10f06a5pdf, author = {Avila, Liliana and Campos, Mariana and Chowdhury, Joie and Dey, Riddhi and Dutta, Ritwick and Fournier, Louise and Alves, Danilo B. Garrido and Lennon, Erika and Main-Klingst, Lea and Masiye-Moyo, Nomasango and Pfitzner, Linn and Reisch, Nikki and Shetye, Aditi and Slidders, Charles and Tan, Floris and Udell, Joe and van Es, Catherine}, title = {{copy-for-spanish-icj-ao\_litigation-notes-digest\_feb2026-2.0-fc3f7f8fe10f06a5.pdf}}, institution = {Center for International Environmental Law}, year = {2026}, month = feb, url = {https://www.ciel.org/wp-content/uploads/2026/06/Copy-for-Spanish-ICJ-AO_Litigation-Notes-Digest_Feb2026-2.0.pdf}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }