The “Grandeur nature” Plan (2016-2020) aims to preserve and intensify nature in Strasbourg, France and is implemented by the city and the local intermunicipal authority (Eurométropole). With this plan, the local authorities seek to provide solutions to the challenge of ecological transition by focusing on the issues of circular economy, the fight against biodiversity loss and CO2 emission reduction. The plan identifies four main axes of action: i) natural heritage to be transferred, ii) shared culture of nature, iii) sustainable land management, and iv) an exemplary and attractive city. In an extensive participatory approach, the plan interacts with local associations and citizens through different interfaces (e.g. workshops, online tools) which allow relevant local authorities to engage with local projects and undertake interventions based on proposals from the public.