In Slovenia and in other European countries the proportion of vehicle fleet that comply with the latest and most stringent emission standards increased sharply in period 2011-2020. Penetration of new technology is highest for the diesel cars.

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.

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. After the pandemic-related halt, the volume has returned to its previous levels.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.

The ownership of passenger cars, closely linked to their usage, has been steadily increasing in Slovenia for a long time – it has doubled since the country's independence in 1991. Between 2008 and 2015, car ownership grew more slowly due to the economic recession, but since 2015, the growth has accelerated again. The exceptions were the pandemic years of 2020 and 2021. Slovenia's motorization rate (measured in the number of personal cars per thousand inhabitants) exceeds the EU average and is higher than that of many economically more developed EU countries.

The proportion of WEEE disposed of within mixed municipal waste is decreasing, while the proportion of WBA disposed of within mixed municipal waste is very low and does not change significantly over the years. On the other hand, the amount of separately collected WEEE is increasing. Almost 15,500 tons of WEEE were collected separately in Slovenia in 2022, which is 7% more than in 2019.