Discussing policies, uses and access to urban greenspaces in the French context to investigate spatial and environmental inequalities in cities : How do we characterize greenspace? What is greenspace (perception, official definition...)? How can we measure/map urban greenspaces (satellite images, national databases, open data etc...)? How to take into account community based initiatives, public policies and the private sector in this field ? This presentation is based on the GREENH-City project (GoveRnance for Equity, EnviroNment and Health in the City ; 2017-2020). More specifically, I will focused on objective 2 and 3, so on the description and analyze of the interventions produced and implemented within municipalities on green spaces according to their socio economics characteristics (objective 2) ; and the use and the contribution of green spaces on the quality of life and well-being of the inhabitants and highlight the existing interactions between the municipal intervention and the population (objective 3). The research project uses a multiple case study (6 cities from the French Network of WHO Healthy Cities) with an approach by mixed methods (qualitative/quantitative data mix : interviews on site in parks, documentation analysis, GIS…). This presentation also aims to show how urban greenspaces can be useful for health, well-being and healthy urban planning, but also, participate in a kind of “green/environmental gentrification”.