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 %.

In 2022, taking into account only the production of energy from RES in Slovenia, Slovenia achieved a 22.9% share of RES in gross final energy consumption. To achieve a binding 25% national target share of RES under the Directive 2009/28/EC, Slovenia purchased the missing production from RES. In 2023, the share of RES in gross final energy consumption was 25.1%, which is 5.3 percentage points more than in 2005. The increase in the share of RES in 2023 is the result of an increase in the use of RES in the electricity production sector.

Between 1961 and 2023, the average sea level along the Slovenian coast increased. A comparison of the ten-year moving averages from the first decade (1961–1970) and the most recent decade (2014–2023) shows that the average annual sea level has risen by approximately 10 cm over this period. From 1961 to 1995, there was no statistically significant trend in sea level rise. However, starting in the 1990s, the sea level began to increase more noticeably. Since 1995, the average annual sea level has risen by about 3.5 mm per year.

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.

In 2022, greenhouse gas (GHG) emissions from sources according to the Regulation (EU) 2018/842 increased by 3.2% compared to the previous year, but in 2023 they decreased by 4.4% and were 7% below the annual target set by Regulation, thus achieving the indicative annual value. The 2030 target set by the National Energy and Climate Plan from 2020 (NECP 2020) is more ambitious and in 2023 the indicative annual value set by the NECP 2020 was not achieved, lagging behind by 0.5 percentage points.