In Slovenia, in 2020 the external costs estimate of electricity production ranges from 0.8 - 2.8 € c2000 / kWh. Despite growing environmental awareness, the price of electricity still does not reflect all external costs. Due to incorrect price signals, which are the result of the current situation on the electricity markets, energy sources in Slovenia remain suboptimally used.

Air pollutant emissions have decreased in the period 2005−2020 to the levels that enable Slovenia achievement of its 2020 targets. But to reach 2030 targets additional decrease is needed. Reduction of emissions contributed to lower impact on ecosystems and human health, as emissions of pollutants that contribute to acidification, ozone precursors and particles, decreased by half compared to 2005.

Slovenia has a fairly high level of energy intensity that is decreasing, especially in the last few years. Average yearly decrease rate in the period 2005-2021 was 2.7 %. Compared to EU-27 Slovenia had 37 % higher intensity in 2020, being 11 % points lower than in 2005.

Passenger car ownership in Slovenia has almost doubled over the last 20 years and has an above-average growth rate. It is closely connected to the use of passenger cars. Since 2008, passenger car ownership in Slovenia has been growing more slowly as a result of the economic recession. Also, motorisation level (expressed in the number of cars per thousand inhabitants) in Slovenia exceeds the average rate of motorisation in the EU as well as in numerous more economically developed EU countries.

The average age of passenger cars in Slovenia increased from 6.8 years in 1992 to 10.6 years in 2021. The share of passenger cars by age has also changed – every decade from 2001 for around 50 %. On the other hand, the share of passenger cars aged less than three years is decreasing for around 30 % every decade. The shares of other types of vehicles showed more fluctuations during the last two decades and smaller changes in respective shares. However, there are now in general more vehicles older than 12 years and less vehicles aged less than three years.