Association of Municipalities Polish Network „Energie Cités“ (PNEC) The Romanian Network of Energy Cities (OER) Guidehouse Centre for Renewable Energy Sources and Saving (CRES) Environ Association National Trust EcoFund (NTEF) SEVEn – The Energy Efficiency Center z.ú. Independent Institute for Environmental Issues UfU e.V. Berlin PNEC – Association of Municipalities Polish Network „Energie Cités“ adelphi research gGmbH