[en] During recent years Nordic cooperation has contributed to a greater integration of the Nordic electric power markets. This has been based on trade on a short-term basis. As a part of increased integration in Europe and the demand for more effective administration of Nordic energy resources, trade with electric power has become more significant. At the same time environmental challenges have lead to an increase in Nordic and European cooperation, also within the energy sector. The aim of the seminar held in Hankoe, Norway, on June 9-11, 1992 was to discuss the problems within this field. Both theoretical and practical aspects were dealt with and developments in Europe and environmental issues were in focus. The lectures given at the seminar are included in this publication. (AB)