The volume of passenger transport demand has been increasing in Slovenia for several decades. Above all the volume of two most unsustainable modes – passenger cars and air transport (especially after 2002). The growth stopped after the economic recession in 2008 but intensified again after 2014. In 2020 and 2021 the pandemics caused another, steep decline. Trend of the public transport modes has been declining for decades, especially the proportion of intercity bus services.

Road goods transport has been growing sharply since Slovenia joined the EU, as the volume of tonne-kilometres of the Slovenian transport carriers increased by more than 2,5 times in the period 2004-2019. The growth of freight transport and transit in Slovenia has been constant in road, rail and maritime transport since independence, despite intermediate economic problems in the EU during the recession 2008-2014. The exception is air freight transport, which has stagnated for years after a sharp decline in 2008.

Data on air pollution shows that Slovenian cities are over-polluted with NO₂ and PM₁₀. Transport is one of the main causes of this pollution. Air quality in Slovenian cities improved during the economic recession after 2008, and after 2016 the NO₂ pollution became worse again.

In the last decades, major emissions of air pollutants from transport decreased. However, road transport remains one of the most significant sources of air pollution. In Slovenia in 2020 road transport contributed 38 % to the total emissions of nitrogen oxides. In the period 1990-2020 emissions of substances that cause acidification and emissions of ozone precursors in transport sector declined by 74 % and 77 %. In the period 2000-2020 emissions of particulate matter decreased by 56 %.

Greenhouse gas (GHG) emissions from transport in Slovenia almost tripled between 1986 and 2019. In the EU, GHG emissions from transport also exceed economic growth on average, but significantly less than in Slovenia; in the period 1990-2019, they increased by 23.6% in the EU-28. The main source of GHG is mostly road transport, which contributes as much as 99% of all GHG emissions from transport.

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.

In 2019, Slovenia's ecological footprint amounted to 5.23 gha per inhabitant, which places our country below the European Union average (5.42 gha per inhabitant). Carbon footprint contributes 56% of the ecological footprint, so it should receive comparatively more attention. A significant share of the ecological footprint is also represented by forest products (23.1%). According to the categories of consumption, housing and personal transport contribute the most to the ecological footprint in Slovenia. Goods is the category with the least contribution to the ecological footprint.

In 2018, more than half of Slovenia's land area was covered by forests (56% or 58% including shrubland), while other mostly natural vegetation accounted for 3%. Farmland occupied 34% of land area, while slightly less than 4% was artificial land, and less than 1% was water. In the periods 1996–2000, 2000–2006 and 2006–2012, land cover and land use changes were relatively small (they occurred on 0.12%, 0.13% and 0.09% of the entire territory, respectively). In the latest period 2012–2018 land cover and land use changes slightly increase (they occurred on 0,44 % ot the entire territory).

In 2023, Slovenia recorded a decrease in the number and total area of functionally derelict areas (FDAs): 1070 FDAs were registered with a total area of 3225.44 ha. This brings the situation closer to that of 2017, with a decrease of 62 in the number of FDAs and 469.83 ha in total area, compared to 2020.

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.