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 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 %.

In the period 1992–2023 nitrogen surplus in Slovenian agriculture decreased. Trend analysis for this period shows that gross nitrogen surplus decreased on average by 1.4 kg N/ha per year or by 54%, and the net surplus by 1.2 kg N/ha per year or by 85%. The lower surplus was mainly due to a 43% increase in nitrogen removal by crops and a 6% decrease in nitrogen input per hectare of utilized agricultural area. A lower excess of nitrogen indicates better nitrogen management in agriculture and consequently a reduction in emissions of nitrogen compounds into the environment.

The emission of primary particles, smaller than 10 µm (PM₁₀), particles smaller than 2.5 µm (PM_2.5) and all total suspended particles (TSP) have decreased in the period 2000-2022 in Slovenia by 23 %, 33 % and 8 %. The main source of emissions of particulate matter are households, mainly due to use of biomass for domestic heating.