In 2023, energy efficient district heating (DH) systems, i.e. systems that meet one of the criteria defined in Article 50 of the Act on Energy Efficiency, produced 87,7% of all heat in DO systems, which is the highest value in the observed period. The total share of heat from renewable energy sources (RES) and waste heat amounted to 21,2% in 2023. It increased by 0.5 percentage points compared to the previous year, and by 5.5 percentage points compared to 2016.

According to the data for 2023, GHG emissions per unit of electricity produced amounted to 166 gCO₂/kWh. In the period 1992–2023, the intensity of GHG emissions decreased by 62,4%. Compared to the EU-27 average, intensity of GHG emissions in Slovenia in 2023 was 19,8% lower.

In 2023, 65% of the population was connected to municipal wastewater treatment systems with secondary or tertiary treatment, which do not produce GHG emissions. Compared to the previous year, the share increased slightly, and compared to 2017, it rose by 3.5 percentage points.

The intensity of GHG emissions from fuels and energy in transport in Slovenia was 4.7% lower than the baseline in 2021, which is 1.3 percentage points below the target reduction. Although the intensity is decreasing, the pace is too slow. The largest contribution to reducing intensity comes from the blending of biofuels. In the EU, the largest reductions were achieved by Sweden and Finland, along with 11 other countries that achieved reductions of 6% or more.

The share of renewable sources in total energy consumption was 18.4% in 2024. It remained unchanged compared to the previous year. The growth of RES is very slow and insufficient to achieve the targets in this area.