Full title of the conference is “Building the governance of sustainable development - European solidarities with new member States”. The conference focuses on the solidarities between the fifteen countries of former Europe and the new members of the European Union. Thus, the various actors being strongly involved, while diagnosing the local strategies through precise examples, the conference will initiate the constitution of a European dialogue on the governance in environment and in sustainable development, issuing concrete propositions of cooperation and of better European management in every field.