Energy consumption of a number of modern Scandinavian electric passenger train operations is studied. The trains are X 2000, Regina, OTU (Oresundstoget), Type 71 "Flytoget" and Type 73 "Signatur". Energy measurements are made in regular train operations in Sweden, Denmark and Norway. For comparison, energy data for an older loco-hauled train of 1994 is also used. In the present study energy consumption for propulsion, on-board comfort and catering, as well as idling outside scheduled service, is determined. The energy consumption includes losses in the railway's electrical supply, i.e. the determined amount of energy is as supplied from the public electrical grid. Emissions of air pollutants, due to production of the electric energy used, are also determined, in this case CO2, NO,, HC and CO. Three alternative determinations are made: (1) Pollution from average electric energy on the common Nordic market; (2) Pollution from "Green" electric energy from renewable sources; (3) Marginal contribution for an additional train or passenger, short-term and long-term. It is shown that the investigated modern passenger train operations of years 2002- 2005 use a quite modest amount of energy, in spite of the higher speeds compared with trains of 1994.