The European PHOtoREactor (EUPHORE) consists of two twin outdoor atmospheric simulation chambers of 200 m3 each. It aims at i)the investigation into the photochemical degradation of atmospheric pollutants and study of generated products which present a potential risk for health and environment. ii) Database development with international projection, iii) Validation and implementation of photochemical models. iv) Development and validation of new instrumentation, as well as improvement of the already existing one v) Exploitation of the EUPHORE smog chambers, for the development of research projects managed by the Foundation, as well as for other national and international institutions.