Regional Nature Parks are predominantly rural territories in which there are several organizations of habitats and economic activities that are conducive to technological or organisational experimentation with multiple stakeholders in the energy sector. Collective and participative approaches are preferred to encourage social acceptance of the energy transition and the involvement in structural projects such as the propagation of local renewable energy production, energy mutualisation in micro-networks and other intelligent ways of managing energy. Consistent with the current experiences in the Regional Nature Parks which confirm the renewable resources potential of the territories (wind, fuelwood, solar and photovoltaics, methanation/biogas, …), it is proposed in this Interreg programme to place emphasis on the ability of the citizen to become more involved in the energy policy at a local level in innovative ways (new cooperation between private and public partners) from the design of the project to its successful realisation through funding. Initially it will be necessary to discuss the territorial challenges for the citizen energy economy, particularly examining the balance between available implementation tools and the needs expressed by project leaders. After this monitoring, efforts will be concentrated on finding ways to efficiently involve citizens in promoting low-carbon projects, to encourage local approaches and to sustain these until implementation. With this citizen involvement programme, territories would like to make a significant contribution to the reduction of greenhouse gas emissions in the territory.