This week, the International Court of Justice (ICJ) made a historic ruling affirming the legal obligation of countries to take concrete action on climate change. The ruling stated that nations are obligated to cut emissions and prevent harm to the climate system, and, in certain cases, even pay for historical damages caused by their emissions. This landmark 'advisory opinion' is significant as it holds states accountable for their greenhouse gas emissions, signaling a potential shift towards increased legal repercussions for those contributing to climate change. The decision was welcomed by developing nations most at risk from climate change, highlighting the global impact of the ICJ's ruling. The ICJ's affirmation of states' responsibilities to regulate fossil fuel emissions and be held legally accountable marks a pivotal moment in the global fight against climate change.