International Law Now Demands Climate Action—and It’s Actually a Huge Deal

When a class of law students dares to think big in Fiji, it can change the course of climate justice around the world. 

A five-year quest by Pacific island countries to clarify states’ legal obligations to tackle climate change, triggered by an assignment given to 27 university students, has led to a landmark ruling delivered last week by the world’s highest court in The Hague.

The International Court of Justice ruled unanimously that failure to curb greenhouse gas emissions may be “internationally wrongful.” It said those responsible must stop polluting activities, and—where restoring infrastructure or ecosystems proves impossible—must compensate communities that suffered as a result. The decision also holds states accountable for companies under their jurisdiction which fuel the climate crisis.

“It is an amazing win,” said Farhana Yamin, a British lawyer and activist who helped to craft the Paris Agreement and has advised small-island nations in climate negotiations. “Very humbled and grateful to youth leadership from the Pacific for taking this forward.”

The decision is seen as a turning point for climate justice, ushering in a new era where countries and companies can be held accountable for their actions. “It sets a new normal,” said Jorge Viñuales, a professor of law and environmental policy at the University of Cambridge and one of the legal experts behind the case. “[It’s] a new legal baseline that cuts through the fog and calls a spade a spade.” 

“Justice is no longer a distant demand,” said Mary Robinson, former United Nations high commissioner for human rights and former president of Ireland, in a statement. “It is now the law.”

Bryce Rudyk, a legal advisor for the Alliance of Small Island States at the U.N. and climate program director at New York University, told Atmos that the outcome of the case was “better than we even hoped.” 

The ruling reframes climate action as a legal obligation, not just a moral plea or a political choice. This hands vulnerable countries a powerful tool for climate justice. It’s bound to change the dynamics of negotiations on the global stage and how litigation plays out in state courts, according to Viñuales. It also opens the door to fresh legal challenges for compensation and reparations. Countries can now more easily sue each other over climate change.