Presentation of some of the numerous actions aimed at developing the Greek economy, in particular the infrastructure/transport sector, by illustration of the Athens underground railway and the Metsovo tunnel, which is in the north-west of the country between the provinces of Ioanina and of Trikala. In the energy field, construction of the largest gas terminal of the country, on Rebythoussa island, as well as the Psytallia water sewage treatment plant in the environmental sector.