The climate mitigation target of the Netherlands violating the State's duty of care, it has to be elevated to reach at least-25% in 2020 compared to 1990. This ruling of the District Court of the Hague in the case opposing the ngo Urgenda to the Netherlands marks a turning point of climate justice. Although limited in its scope, it contributes to the subjectivization of climate justice actors but also to the objectivization of associated liability, opening the way for a " dialogue of judges " and influence on international negotiations. 1 This analysis was written with the support of the circulex programme (anr-12-glob-0001-03) founded by the French National Agency for Research, whose purpose is to study the circulation of norms and actors in international environmental governance, and is a revised version of an article published in la Revue Juridique de l'Environnement 2015 (4).