The legal implications of the international court of justice's advisory opinion: Climate change obligations for African States

Abstract

On 23 July 2025, the International Court of Justice delivered its landmark Advisory Opinion on Obligations of States in Respect of Climate Change, constituting the most authoritative judicial statement yet made on State obligations under international law to protect the climate system. This dissertation examines the implications of that Opinion for developing African States, situating the analysis within the foundational international climate law framework from the UNFCCC and Kyoto Protocol through to the Paris Agreement and the principle of Common but Differentiated Responsibilities and Respective Capabilities. Africa, responsible for less than four percent of global cumulative greenhouse gas emissions, bears disproportionately severe climate impacts, rendering the Opinion's treatment of differentiation a matter of acute legal significance. Through doctrinal analysis of the Opinion's customary international law and treaty-based findings, the human rights-climate nexus, and the separate opinions of the three African judges, the dissertation concludes that while the Opinion makes landmark normative contributions, it fails to translate CBDR-RC into operationally specific differentiated obligations. The research recommends legal and institutional pathways through which African States, the African Union, and international legal bodies can address this deficiency, leveraging the Opinion to advance climate justice, finance accountability, and domestic implementation. The integration of climate and human rights obligations provides both African States seeking to hold major emitters accountable and domestic courts adjudicating climate cases with a powerful and authoritative legal framework. And the Opinion's specific references to Africa through the UNCCD, through UNFCCC provisions targeting African vulnerability, and through its factual acknowledgement that Africa bears disproportionate climate impacts despite negligible historical responsibility situate the global legal analysis within a factual framework that African States can and must deploy in subsequent proceedings. Concluding that, The ICJ Advisory Opinion has confirmed, with the authority that States bear binding legal obligations to prevent significant harm to the climate system, that those obligations are calibrated by the principle of common but differentiated responsibilities and respective capabilities to each State's historical contribution and developmental capacity, and that the human rights of present and future generations depend on the adequate discharge of those obligations.