The European Court of Human Rights (“ECtHR”) has ruled on a case brought against Switzerland by the Swiss association KlimaSeniorinnen on behalf of its members and four individual women of the association. The ECtHR found that Switzerland has violated Art. 8 of the European Convention on Human Rights by failing to take timely and sufficient action to adopt and implement relevant legislation and measures to mitigate climate change. The ECtHR also held that, from a procedural perspective, Switzerland failed to grant effective access to court to challenge the insufficient implementation of mitigation measures. In this contribution, we summarize the background of the case and the ECtHR’s decision and analyze its possible impacts.