Energy production from biomass (wood chips) is necessarily limited by its renewability, availability, distance of sustainable supply, preparation and overall exploitation efficiency. A strong encouragement to the construction of plants that produce electricity and heat often represents variable and optimistic assessment of availability and renewability of various types and forms of biomass (especially wood chips), as well as the quality and type of consumers. Possible effects on sustainable cost-effectiveness have been analysed as related to sustainable cost-effectiveness of combined heat and power plants and also heating plants with a special critical consideration of the significance of the production, purpose, conditions, manner and consumption location of electricity and heat. Quantified values present possible limitations and insecurity of using energy transformation in the estimated exploitation period.

An important feature of today’s Croatian territory is its position at the historical junctions of Northern and Southern Europe, as well as Pannonia, i.e. the Danubian region and the Mediterranean. The determinants of Croatia as an Adriatic and Central European, i.e. Danube country, are the basis of the process of valorisationof its spatial advantages. The position on the Adriatic front and the Danube Basin backbone significantly determines the maritime and continental significance of the position of the Croatian area. The expansion of the gravitational Danube spatial zone of traffic and economic influence will certainly be contributed by the corridors that pass through Croatia and open the Danube Basin towards the Mediterranean on the Croatian Adriatic front - the geographical source of Croatian national power. The Danubian-Adriatic orientation is a condition in which the Adriatic-Ionian Road and Corridor X, as a link between Western Europe and the Black Sea and Middle East, make the area of Croatia and Bosnia and Herzegovina a transit ring and an intersection at the gates of Southeast Europe. Thus, the Republic of Croatia, as a member of NATO and the EU, is an important factor in geographical and transport integration, but also in the security and geopolitical stabilization of neighbouring countries in Southeast Europe. Serbia’s latest geographical and traffic projects integrated into regional transport projects under Russian-Turkish eopolitical influence make the Baltic-Adriatic-Black Sea zone sensitive security wise, and push the territory of the Republic of Croatia and Bosnia and Herzegovina into geographical and traffic regional shadow and marginalization and directly affect their overall development and security.