At the end of 2017, Slovenia adopted the Slovenian Development Strategy 2030, the new umbrella national document. One of the Strategy's objectives is a low-carbon circular economy and a sustainable natural resource management. Slovenia is heading towards a period of adopting and preparing various strategies and plans, which will specify objectives for the period to 2030 and 2050. One of these is Slovenia's energy concept (ECS), which will identify orientations and plans regarding different areas of energy policy to 2030 and 2050. Two headline targets of Slovenia's energy concept are to reduce greenhouse gas emissions arising from energy consumption by at least 40% until 2030 as compared to 1990, and to reduce greenhouse gas emissions arising from energy consumption by a minimum of 80% by 2050 as compared to 1990. The aim is to ensure a sustainable energy use and that is why the concept will deal with three aspects of sustainability: climate variability, reliability of the energy supply and power supply competitiveness.