Green City Day: A new day entirely dedicated to French and international local authorities!
On Thursday 4 December 2025, as part of the Paysalia trade show, Green City Day is back for another edition dedicated to local authorities. The aim of the day is to help elected representatives, town planners and green space managers meet their environmental challenges, by highlighting innovative, sustainable solutions for greening towns and cities and developing urban green spaces.
🌱 Three themes to think about the city of tomorrow
The aim of this day is to offer local authorities a programme that fully addresses the issues faced by elected representatives, town planners and green space managers. Green City Day 2025 will therefore focus on three major themes, providing answers and highlighting feedback:
A cooler city: Designed in an urban environment where nature plays a central role, with the aim of contributing to a more resilient city in the face of the challenges of climate change, enhancing biodiversity and offering a more pleasant environment for its inhabitants.
A greener city: characterised by the renaturation of urban space, with the aim of creating more resilient, living environments where people and nature live together in harmony.
A healthier city: Characterised by an environment conducive to better public health, which prioritises the well-being of its residents by integrating green spaces, sustainable infrastructures and vegetation solutions to improve air quality, regulate temperature and encourage biodiversity.
🤝 Committed partners
This day is being organised in collaboration with leading partners, enabling us to be as close as possible to the players and offer a programme that is as close as possible to the needs of our stakeholders:
AITF (Association des Ingénieurs Territoriaux de France)
Auvergne Rhône-Alpes Tourisme
CNVVF (Conseil National des Villes et Villages Fleuris)
Espace Public & Paysage
En Vert & Avec Vous Magazine
FFP (Fédération Française du Paysage)
Hortis (Réseau des responsables d’espaces nature en ville)
Observatoire des Villes Verte
Plante & Cité
UNEP (Union Nationale des Entreprises du Paysage
URCAUE (Union Régionale des CAUE)
Village Aménagement Durable
These partners are contributing their expertise to offer a rich and relevant programme, to meet the needs of local authorities in terms of sustainable landscaping.
🌍 INspiring ambassadors
Three ambassadors, committed to the ecological transformation of their cities, will share their experiences:
Gautier Chapuis, Deputy Mayor of Lyon in charge of Greening and Biodiversity
Romain Betti, Director of Green Spaces for the City of Nice
Francesco Tresso, Deputy Mayor of Turin in charge of Greening and Maintaining the City
Their testimonies will offer concrete perspectives on the strategies implemented to green urban spaces.
Participate in the 2025 Green City Day
Are you an elected official, technician or local decision-maker? Don't miss this day dedicated to solutions for greener, more sustainable cities.
Join us on Thursday 4 December 2025 at the Paysalia trade fair at Eurexpo Lyon.
