Between 1961 and 2023, the average sea level along the Slovenian coast increased. A comparison of the ten-year moving averages from the first decade (1961–1970) and the most recent decade (2014–2023) shows that the average annual sea level has risen by approximately 10 cm over this period. From 1961 to 1995, there was no statistically significant trend in sea level rise. However, starting in the 1990s, the sea level began to increase more noticeably. Since 1995, the average annual sea level has risen by about 3.5 mm per year.

The above-average runoff years of 2013 and 2014 were followed by a below-average year in 2015 and a period of average annual runoff from 2016 to 2021. In 2022, runoff levels were again below average, while 2023 saw a return to above-average conditions. Based on the annual river balance, 2023 ranks among the wettest years in the history of hydrological measurements. Between 1961 and 2023, the most water-abundant years were 2013, 2014, and 2023. In contrast, the driest years were 1983, 2003, 2007, 2011, 2015, and 2022.

In 2022, greenhouse gas (GHG) emissions from sources according to the Regulation (EU) 2018/842 increased by 3.2% compared to the previous year, but in 2023 they decreased by 4.4% and were 7% below the annual target set by Regulation, thus achieving the indicative annual value. The 2030 target set by the National Energy and Climate Plan from 2020 (NECP 2020) is more ambitious and in 2023 the indicative annual value set by the NECP 2020 was not achieved, lagging behind by 0.5 percentage points.

In Slovenia, the volume of passenger transport demand has been increasing over the past few decades. Particularly, the volume of one of the most environmentally burdensome modes of transport – car transportation – has been growing. Its share places Slovenia in an unenviable third place among EU member states where residents rely most heavily on private cars for their journeys. Until the pandemic, the volume of the most environmentally damaging mode of transport, air travel, was also growing rapidly.

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 %.