On April 9, 2024, the European Court of Human Rights (ECtHR) ruled on three applications concerning the fight against climate change and the positive obligations of the signatory states of the European Convention on Human Rights (ECHR) in this respect. Two of the applications were declared inadmissible (Duarte Agostinho and Others v. Portugal and 32 Other States and Carême v. France). The third, Klimaseniorinnen v. Switzerland, was a great success. This blog post analyzes the Carême decision in which the Court declared inadmissible an application brought by a former mayor of a French town on the grounds of incompatibility ratione personae with the provisions of the Convention within the meaning of Article 35 § 3 (§ 88). In my view, this is an ill-developed decision, which could dangerously imply a regression in environmental matters.