The International Court of Justice (ICJ) details its Advisory Opinion issued on July 23, 2025, concerning States' obligations regarding climate change. The United Nations General Assembly requested this opinion, posing two key questions: what are States' international legal obligations to protect the climate system from anthropogenic greenhouse gas emissions, and what are the legal consequences for States that cause significant harm through their acts or omissions? The ICJ's unanimous opinion, a rare occurrence, found that States have binding obligations under various international treaties and customary international law to address climate change and its impacts. Furthermore, the Court determined that a breach of these obligations constitutes an internationally wrongful act, entailing State responsibility, and clarified the framework for assessing legal consequences, including cessation of wrongful acts and reparations.