The estimated value of external transport costs in 2021 is approximately 2.4 billion euros, accounting for 4.6% of Slovenia's GDP. The majority (99%) of these costs are attributed to road traffic, while only 1% is attributed to rail traffic. Two-thirds of external costs arise from passenger traffic, with the remaining one-third from freight traffic. Notably, a third of the external costs of transport are associated with traffic accidents, followed by costs related to congestion (20%), climate change (18%), air pollution (16%), damage to habitats (7%), and noise (6%).

In Slovenia, built-up areas continue to increase, representing 5.7% of the land use structure in 2023. In the period 2019-2023 built-up areas were predominantly spread to grasslands (42%), forest (18.6%) and the category other (16.1%), with the total built-up area increasing by 1,618.9 ha over this period. Existing data sources in Slovenia have recently made it possible to evaluate the actual loss of land to development.

The intensity of final energy consumption as well as sectoral intensities in Slovenia have decreased over the period 2005-2022. Most in industry, least in transport. Comparison with the EU-27 shows that Slovenia is worse than the EU-27 average, but the gap has almost halved over the period 2005-2021, with contribution of all sectors except transport.

Total revenues from taxes/charges from road, rail and inland water transport in the EU28 amounted to EUR 370 billion in 2016. This is approximately 2.5% of EU28 GDP in 2016. Aviation and maritime revenues are calculated only for a set of selected airports and ports, so it is not possible to determine the share of these revenues in total aviation and maritime tax/charges revenues of transport in the EU28.

The intensity of SO2, NOx and CO2 emissions from electricity and heat production in public thermal power plants in 2021 was significantly lower than in 2005, with SO2 emissions intensity 94% lower, NOx  71% lower and CO2 28% lower. Compared to the EU-27 average, the intensity of CO2 emissions in Slovenia in 2021 was higher, NOx emissions slightly lower and SO2 emissions significantly lower.