Primary energy consumption amounted to 6,071 ktoe in 2023 and decreased by 4.1 % compared to the previous year. The decrease was a result of a decrease in the final energy consumption, while electricity production was higher compared to 2022, mainly due to better hydrological conditions. Primary energy consumption was 604 ktoe (- 9%) lower than the indicative target value for 2023 from the from the National Energy and Climate Plan from 2020 (NECP 2020), and 364 ktoe (- 5.6%) lower than the value from the National Energy and Climate Plan from 2024 (NECP 2024).

Final energy consumption amounted to 4,491 ktoe in 2023 and decreased by 5 % compared to the previous year. There was a decrease in all sectors, with the exception of other use. Final energy consumption was 380 ktoe (- 7.8%) lower than the 2023 indicative target value from the National Energy and Climate Plan from 2020 (NECP 2020) and 282 ktoe (- 5.9 %) lower than the value from the National Energy and Climate Plan from 2024 (NECP 2024). The indicative annual target was thus achieved. In the period 2000‒2023, final energy consumption decreased by 1 %.

Land areas, prepared for irrigation, have increased from 4,554 ha to 6,414 ha in the period 2000-2024, and their share in total utilized agricultural area from 0.9% to 1.3%. The water consumption per hectare of irrigated land, which strongly depends on weather conditions in each year, has decreased since 2000. Slovenia belongs to the group of EU countries with the smallest share of utilized agricultural area ready for irrigation.

Total GHG emissions in the ETS sector recorded an annual decrease for the sixth year in a row. In 2023, they decreased by almost 6% and reached the lowest value in the observed period. The decrease is mainly a result of much lower GHG emissions across all groups, the most in manufacturing industries and construction group. At the EU level, a legally binding target of reducing GHG emissions by 62% by 2030 compared to the 2005 level has been adopted for the ETS sector, which is a common target for the EU and is not further differentiated by member states.

The above-average runoff years of 2013 and 2014 were followed by a below-average year in 2015 and a period of average annual runoff from 2016 to 2021. In 2022, runoff levels were again below average, while 2023 saw a return to above-average conditions. Based on the annual river balance, 2023 ranks among the wettest years in the history of hydrological measurements. Between 1961 and 2023, the most water-abundant years were 2013, 2014, and 2023. In contrast, the driest years were 1983, 2003, 2007, 2011, 2015, and 2022.