UN General Assembly Adopts Resolution Affirming States’ Legal Duty to Combat Climate Change and Protect Vulnerable Nations

The United Nations General Assembly (UNGA) has adopted a landmark resolution reaffirming that states have legal obligations under international law to protect the global climate system by reducing greenhouse gas emissions and preventing environmental harm. Adopted on May 21, 2026, the resolution builds upon the historic advisory opinion delivered by the International Court of Justice (ICJ) in July 2025 and represents a significant step toward strengthening international climate accountability.

The resolution, spearheaded by the Pacific island nation of Vanuatu and supported by several climate-vulnerable states, calls upon all UN member states to comply with the obligations identified by the ICJ regarding climate change. It affirms that states must take all appropriate measures to prevent activities within their jurisdiction from causing significant harm to the climate system and to other nations, particularly those most vulnerable to climate-related impacts.

The initiative emerged from growing concerns among small island developing states, which face disproportionate consequences of rising sea levels, extreme weather events and environmental degradation despite contributing minimally to global greenhouse gas emissions. While negotiations led to substantial revisions of Vanuatu’s original proposal, the adopted resolution nevertheless preserves the central principle that states may incur international responsibility for climate-related harm caused by breaches of their legal obligations.

Notably, the final text omitted a proposed “International Register of Damage,” which would have established a formal mechanism for documenting climate-related losses attributable to specific emissions. However, the resolution leaves open the possibility that states found to have violated climate obligations could be required to provide compensation or reparations to affected nations.

Following the vote, UN Secretary-General António Guterres described the resolution as a major advance for climate justice. Emphasising that countries contributing least to global warming often suffer its gravest consequences, he reiterated the need for a rapid and equitable transition away from fossil fuels and toward renewable energy sources. The resolution also reinforces the objective of limiting global temperature rise to 1.5°C above pre-industrial levels, consistent with the goals of the Paris Agreement.

The resolution was adopted by an overwhelming majority of 141 member states. However, eight countries voted against it, including the United States, Russia and Iran. The United States criticised the resolution, arguing that the ICJ's interpretation of state obligations concerning transboundary climate harm lacks a sufficient legal basis and could impose extensive liabilities on major emitting nations.

Despite opposition from several large greenhouse-gas emitters, the resolution is widely regarded as a significant development in international environmental law. By endorsing the principles articulated by the ICJ, the General Assembly has strengthened the normative framework governing state responsibility for climate change and underscored the growing expectation that governments must take meaningful action to address the global climate crisis.