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Varna Scientific and Technical Unions (VSTU) is a non-governmental, non-political organization. It is a member organization of the Federation of the Scientific and Technical Unions in Bulgaria (FSTU) which unites 19 scientific and technical unions (STU) and 34 local societies in the major cities of the country.
Via Expo is an organizer of high-level specialized international exhibitions and conferences key industry fields: energy efficiency, renewable energy, waste management, recycling, environment, elevators & escalators, organic products, gifts, packaging and food; intelligent buildings, smart cities and ICT. The events are focused on the South-European market and they are host in Sofa, Bulgaria.