Litigation Note

The document translates the ICJ's 2025 advisory opinion into practical tools for climate litigation, focusing on government framework cases, adaptation, remedies, the right to a healthy environment, corporate conduct, climate finance, speculative interventions, and regulatory rollbacks. It emphasizes that States have binding obligations to limit warming to 1.5°C, act with 'stringent' due diligence based on the best available science (IPCC), and protect human rights. The notes detail how these findings can be used to challenge inadequate NDCs, hold corporations accountable for emissions, and oppose the dismantling of environmental protections.

• The ICJ established that 1.5°C is the primary temperature goal of the Paris Agreement and that Nationally Determined Contributions (NDCs) must be capable of achieving this limit.
• States are held to a 'stringent' due diligence standard of care regarding climate mitigation and adaptation, requiring them to do their 'utmost' to reflect their highest possible ambition.
• The ICJ affirmed that the right to a clean, healthy, and sustainable environment is a binding norm of international law and a necessary precondition for the enjoyment of other human rights, such as the rights to life and health.
• States have a binding legal obligation to implement adaptation planning and measures, and developed countries are legally required to provide financial resources to assist developing countries with both mitigation and adaptation.
• The ICJ ruled that the failure of a State to take appropriate action to protect the climate system—specifically including fossil fuel production, consumption, licensing, or subsidies—may constitute an internationally wrongful act.
• State responsibility for climate harm is not negated by the fact that there are multiple contributors; it is scientifically possible to determine each State's total contribution to global emissions.
• Breaches of climate obligations can trigger a full range of legal consequences, including cessation of the wrongful act, guarantees of non-repetition, and full reparation (restitution, compensation, and satisfaction).
• The ICJ emphasized that the duty to prevent significant harm to the environment applies to the climate system and must be considered through the lens of intergenerational equity.

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). Litigation Note. Center for International Environmental Law. https://www.ciel.org/wp-content/uploads/2026/03/ICJ-AO_Litigation-Notes-Digest_Feb2026.pdf

Chicago

Avila, Liliana, Mariana Campos, Joie Chowdhury, Riddhi Dey, Ritwick Dutta, Louise Fournier, Danilo B. Garrido Alves, et al. Litigation Note. Center for International Environmental Law, 2026. https://www.ciel.org/wp-content/uploads/2026/03/ICJ-AO_Litigation-Notes-Digest_Feb2026.pdf.

Wikipedia

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BibTeX

@techreport{avila2026litigation, 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 = {{Litigation Note}}, institution = {Center for International Environmental Law}, year = {2026}, month = feb, url = {https://www.ciel.org/wp-content/uploads/2026/03/ICJ-AO_Litigation-Notes-Digest_Feb2026.pdf}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }