In a historic decision, the International Court of Justice (ICJ) has affirmed that countries can sue one another over climate change impacts, including for historic emissions. Though non-binding, the ruling is expected to influence global climate litigation and accountability efforts. It marks a significant victory for vulnerable nations—particularly small island states like Vanuatu and the Marshall Islands—who brought the case forward after years of stalled global progress.
The ICJ ruled that failing to develop ambitious climate action plans constitutes a breach of obligations under the 2015 Paris Agreement. Importantly, it confirmed that broader international environmental law applies to all countries, even those not party to the Paris Agreement.
This opens the door for affected nations to seek compensation for climate-induced damages, including destroyed infrastructure and loss of land, if they can demonstrate a link between emissions and harm. The ruling also warns governments that subsidizing fossil fuels or issuing new oil and gas licenses may violate international obligations.
The case was sparked by a group of Pacific Island law students in 2019 and has drawn support from numerous developing nations. Legal experts suggest this opinion could now be used in both international and domestic courts to demand accountability and reparations.
While countries like the UK acknowledged the opinion, they stressed continued support for existing climate treaties. The U.S., not bound by ICJ jurisdiction, downplayed the ruling, reaffirming its “America First” stance.
Nonetheless, legal advocates see this as a watershed moment that empowers vulnerable states and reshapes the future of climate justice worldwide.
