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 2022 road transport contributed 43 % to the total emissions of nitrogen oxides. In the period 1990-2022 emissions of substances that cause acidification and emissions of ozone precursors in transport sector declined by 71 % and 76 %. In the period 2000-2022 emissions of particulate matter decreased by 51 %.

Greenhouse gas (GHG) emissions from transport in Slovenia almost tripled between 1986 and 2022. In the EU, GHG emissions from transport also exceed economic growth on average, but significantly less than in Slovenia; in the period 1990-2022, they increased by a quarter 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 majority share of traffic emissions in Slovenia in total GHG emissions and insufficiently effective measures to reduce them hinder Slovenia's efforts to achieve the accepted obligations.

The average age of the passenger car fleet in Slovenia has been steadily increasing; over the past thirty years, it has risen by almost four years — from 6.8 years in 1992 to 11.1 years in 2023. Over the past two decades, the share of cars older than 12 years has been continuously growing, by around 50% each decade. At the same time, the share of cars less than three years old has been steadily declining — by roughly 30% per decade.

In 2018, the ecological footprint of Slovenia was 5,37 gha per capita while biocapacity was 2.2 gha. For such a lifestyle 3.39 Earths would be required for the world's population to live within planetary regenerative capacity. This places Slovenia above the average of the EU countries (4.6 gha per capita). The carbon footprint usually accounts for around 60% of the total ecological footprint and therefore needs to receive comparatively more attention. According to consumption categories, housing and personal transportation contribute the most to the ecological footprint in Slovenia.

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.

Water consumption in Slovenia represents a relatively small proportion of the annual gross water outflow from the country. In 2019, the annual WEI+ index was around 3%, and same 3% compared to the periodic average of water availability. The Long-term Annual Average Water Exploitation Index shows a slight decrease, but the trend is not statistically significant.

In recent years, the amount of wastewater treated by secondary or tertiary treatment processes increased, while primary treatment processes have closed. The amount of wastewater treated through secondary treatment processes increased by 150 % since 2000 or from 30 million m3 (in 2000) to almoust 45 million m3 (in 2019). There were almost no tertiary wastewater treatment processes in Slovenia in 2000, and in 2019, 72% of wastewater or 113 million m3 of wastewater was treated by tertiary process.

Groundwater in intergranular aquifers in Slovenia is most affected by nitrate pollution, particularly in northeastern Slovenia. In contrast, groundwater in karst and fissured aquifers is less impacted due to geographical conditions, lower population density, and a smaller proportion of agricultural land.

For the period 2019–2024, poor chemical status was identified in the water bodies of the Savinja, Drava, and Mura basins. The main cause of poor chemical status in all water bodies was nitrate, with atrazine additionally contributing in the Drava basin.