As the human right to a healthy environment is codified around the globe, some systems still lag behind. One noticeable straggler is the Council of Europe, which is currently undergoing its fourth attempt to recognize the right. This article examines the proposals tabled within this system in light of overarching debates about climate justice and environmental rights, before focusing specifically on the spatial and temporal limits of the European Convention on Human Rights (ECHR) and the institutional features of its Court. First, the article describes what the author sees as the current liminal moment in the development of human rights law, a time of transition in which established legal concepts can be questioned or reaffirmed. Second, it sketches recent proposals for locating and conceptualizing the right to a healthy environment within the Council of Europe. Evaluating different options, it makes the case for including this right in the ECHR. Third, the article discusses the right's potential to reshape the spatial and temporal limitations on legal subjectivity and Convention protections. These proposals come at a crucial time when the system's ability to protect human rights from environment-related impacts is being tested by climate litigation. The article understands these developments as interrelated and discusses whether current proposals could deliver on demands for climate justice by extending protection to future generations and for extraterritorial environmental impacts.