Ioannina is establishing Greece's first Climate Neutral Zone (CNZ) — a defined urban area where low- and zero-emission mobility measures, nature-based solutions, and participatory governance converge to demonstrate replicable climate neutrality. Starting from approximately four city blocks in the historic centre, CRISP builds the spatial, legal, technical, and social foundations needed to scale CNZ principles citywide and offer a model for other Greek and European cities. The project combines rigorous urban and legal analysis with deep community co-design, treating citizen ownership as essential — not optional — to lasting change.