ICJ AO Litigation Notes Digest February 2026

The document translates the ICJ's advisory opinion into practical tools for climate litigation, focusing on the 'stringent due diligence' States must exercise to regulate private actors, particularly in the fossil fuel industry. It highlights that States may be in breach of international obligations if they fail to prevent significant climate harm through the production, licensing, or subsidizing of fossil fuels. The brief also connects these findings to specific case categories, including licensing, duty to regulate, corporate frameworks, accountability for loss and damage, and greenwashing, emphasizing the 1.5°C temperature goal as a legal standard.

• The ICJ established that States must exercise 'stringent due diligence' to ensure private actors under their jurisdiction do not cause significant harm to the climate system, which requires not only adopting rules but also vigilance in enforcement and administrative control.
• States may commit an internationally wrongful act if they fail to take appropriate action to protect the climate system from greenhouse gas emissions, specifically through the production, consumption, licensing, or subsidizing of fossil fuels.
• The ICJ identified the 1.5°C global average temperature increase as the primary temperature goal under the Paris Agreement, which serves as a legal threshold for emissions reduction plans.
• State obligations regarding climate protection include the regulation of non-state actors and encompass a broad range of human activities, including both the production and consumption of greenhouse gases.
• The Court ruled that a risk of significant harm can result from the cumulative effect of different acts by various States and private actors, meaning States must assess cumulative effects even if individual activities seem insignificant in isolation.
• Under the Paris Agreement, Nationally Determined Contributions (NDCs) create binding legal obligations for States to act with due diligence in deploying domestic mitigation measures, including the regulation of private entities.
• The ICJ noted that while climate change is cumulative, it is scientifically possible to determine the total contribution of individual States to global emissions, accounting for both current and historical emissions.

APA

Center for International Environmental Law (2026). ICJ AO Litigation Notes Digest February 2026. https://www.ciel.org/wp-content/uploads/2026/03/ICJ_AO_Litigation-Note-on-Corporate-Conduct_Feb2026.pdf

Chicago

Center for International Environmental Law. ICJ AO Litigation Notes Digest February 2026. 2026. https://www.ciel.org/wp-content/uploads/2026/03/ICJ_AO_Litigation-Note-on-Corporate-Conduct_Feb2026.pdf.

Wikipedia

{{cite report |author=Center for International Environmental Law |title=ICJ AO Litigation Notes Digest February 2026 |date=February 2026 |url=https://www.ciel.org/wp-content/uploads/2026/03/ICJ_AO_Litigation-Note-on-Corporate-Conduct_Feb2026.pdf |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{centerforinternationalenvironmentallaw2026icj, author = {{Center for International Environmental Law}}, title = {{ICJ AO Litigation Notes Digest February 2026}}, institution = {Center for International Environmental Law}, year = {2026}, month = feb, url = {https://www.ciel.org/wp-content/uploads/2026/03/ICJ_AO_Litigation-Note-on-Corporate-Conduct_Feb2026.pdf}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }