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This legal memorandum by the Center for International Environmental Law (CIEL) analyzes the May 21, 2024, advisory opinion (AO) from the International Tribunal for the Law of the Sea (ITLOS) regarding States' obligations to protect oceans from climate change. The document details how the ITLOS AO defines anthropogenic greenhouse gas (GHG) emissions as marine pollution under the UN Convention on the Law of the Sea (UNCLOS) and discusses the implications of this ruling for ongoing climate advisory proceedings before the International Court of Justice (ICJ).

This briefing by the Center for International Environmental Law (CIEL) and the Global Initiative for Economic, Social and Cultural Rights (GI-ESCR) synthesizes the activities of the UN Committee on the Rights of the Child (CRC) regarding climate change during 2020 and 2021. It details the CRC's increasing focus on state obligations to mitigate climate change, the role of financial and business actors in environmental harm, and the development of a forthcoming General Comment on children's rights and the environment.

This amicus curiae brief, submitted by the Center for International Environmental Law (CIEL) and the Vermont Law School Center for Applied Human Rights, provides legal analysis to the Inter-American Court of Human Rights regarding a request for an advisory opinion from the Republic of Colombia. The brief argues that State Parties to the American Convention on Human Rights have extraterritorial obligations to ensure their acts and omissions do not cause environmental harm that infringes on human rights outside their borders, and that the Convention should be interpreted through a normative dialogue with international environmental law.

This fact sheet by the Center for International Environmental Law analyzes key arguments presented by States during the first week (December 2-6) of climate justice hearings at the International Court of Justice. It contrasts the positions of major polluting States against those of climate-vulnerable nations regarding the applicability of international law, human rights, transboundary harm, and reparations in the context of the climate crisis.

This briefing by the Center for International Environmental Law argues that the International Court of Justice (ICJ) should apply the full spectrum of international law—including human rights, the law of the sea, and customary law—to determine State obligations regarding climate change. It counters arguments from 'big polluters' who claim that the UN climate regime (UNFCCC and Paris Agreement) is the sole relevant legal framework and that its obligations are merely procedural. The document asserts that States have longstanding duties to prevent transboundary environmental harm and protect human rights, which necessitates a phase-out of fossil fuels and the provision of reparations for climate-related injuries.