[en] Contributions to these meetings are provided under various forms. The addressed topics have been: energy transition (how to choose an energy mix, to plan it and to fund it), hydroelectricity (why valorising river weirs), transports and clean mobility (which alternatives for fossil fuels), wind energy (which benefits can be expected from the development of a wind farm, and how to design an exemplary project), energy performance (which tools to integrate renewable energies to new and renovated buildings), geothermal energy with heat pumps (which devices), ground-based photovoltaic power station (how to develop a project), biomass (how to choose an installation with respect to needs), heat or cold networks (how to implement and to exploit them), biogas (how to design an exemplary project which benefits the territory), photovoltaic on building (which are the prevailing criteria). Some other documents are provided which address the following issues: questions and answers about renewable energies, assets of geothermal energy for buildings, assessment of the Heat Fund, examples of geothermal energy on a probe field, methanisation as a key element for energy and ecology transition, requirements specifications for a feasibility study of installation of a heat pump, performance of field thermal response test