On 23 July 2025, the United Nations’ highest court, the International Court of Justice, also known as the World Court, determined that wealthy countries must comply with global climate treaties or risk having to pay compensation to nations most impacted by the harms of climate change. With a topic as ongoing and stalled as the environmental crisis, the I.C.J’s landmark opinion could finally yield progress in a global response to climate change. 

Judge Yuji Iwasawa, who presided the panel of 15 judges, said “States must cooperate to achieve concrete emission reduction targets,” adding that any failure by countries to comply with the “stringent obligations” imposed on them by climate treaties was ultimately a breach of international law. The court also mentioned countries were responsible for the actions of businesses and companies under their jurisdiction. By holding larger polluters accountable, the court aims to better enforce climate treaties in order to address the “urgent and existential threat posed by climate change.” Failure to comply, according to the proceedings, could result in “full reparations to injured states in the form of restitution, compensation and satisfaction provided that the general conditions of the law of state responsibility are met.”

In the context of global climate change, ecological destruction, and environmental injustice, the I.C.J.’s unanimous decision could mark a significant turning point in the application and enforcement of international climate agreements. Wealthier nations make for larger polluters, meaning smaller countries often face the consequences of climate change despite engaging in far less of the pollutive anthropogenic activities causing it. Accordingly, Vanuatu, the country that spearheaded the initiative and brought this case to the I.C.J., spoke on the existential threat climate change poses for smaller nations. In a statement when the proceedings first began, Ralph Regenvanu, Vanuatu’s Special Envoy for Climate Change and Environment, said “the outcome of these proceedings will reverberate across generations, determining the fate of nations like mine and the future of our planet.” Regenvanu also spoke on behalf of other Melanesian nations most vulnerable to rising sea levels and temperatures, including Fiji, Papua New Guinea, and the Solomon Islands. Pointing blame to a handful of “readily identifiable states,” Regenvanu noted how larger nations emit the vast majority of greenhouse gas emissions while facing the fewest consequences of their impacts. 

The advisory opinion aligns with the precedent established in the 2015 Paris Climate Agreement, which detailed the extensive harms of greenhouse gas emissions and set the goal of maintaining global warming below 1.5 degrees Celsius (2.7 Fahrenheit). The recent I.C.J. ruling concerns the enforcement of this agreement, denoted by state obligations to the adherence of this international treaty. While the I.C.J’s decision was significant, its impact may be hindered by the fact that the United States, one of the world’s largest polluters, has retreated from global climate agreements under President Trump. This calls into question the jurisdiction on state and global levels: Should international law come before national policy in cases of environmental destruction, a worldwide phenomena in which the causes and consequences are both universal yet disparately emitted and experienced?

The court’s proceedings arise from a fundamental question of human rights in accordance with climate justice. The body of 132 countries that co-sponsored the resolution to go before the U.N. General Assembly unanimously called on the I.C.J. to voice its opinion on two crucial questions: What obligations do states have to tackle climate change under international law and what are the legal consequences if they fail to do so? 

Ultimately, under international law, Judge Iwasawa said: “The human right to a clean, healthy and sustainable environment is essential for the enjoyment of other human rights.” The I.C.J. proceedings brought the topic of environmental justice and human rights to the forefront of international law, and the court’s rulings have the potential to ignite a chain response of intensified climate-related litigation worldwide and a stricter crackdown on the biggest polluters. This signifies a major development toward an effective global resolution for environmental justice. After all, humanitarianism is inherently an environmental issue just as environmentalism has humanitarian implications; in other words, humanity needs a healthy planet to the same extent the planet needs humanity to right its wrongs.