Phytoplankton biomass, expressed as chlorophyll a concentration, reflects nutrient loading in the marine environment. Chlorophyll a concentrations shows a trend towards improvement in the status of the Slovenian sea, as the ecological status has been assessed as high or good over the last period.

Deadwood is an important animal and plant habitat that contributes to the biodiversity of forest ecosystems. According to Slovenia Forest Service data, the volume of standing and fallen trees without stumps and branches in 2022 was 21.3 m³/ha, which represented approximately 6% of the entire wood stock of forest stands. In virgin forests, however, the deadwood volume can be even several dozen times greater.

The quality of bathing water along the Slovenian coast is excellent, which ranks Slovenia at the top among the EU countries.

In the past centuries, forest area has been increasing constantly after 2010; however, the rate of expansion has slowed down and remains relatively stable in recent years. Since 1875, when forests covered only 36% of the Slovenian territory, forest cover has increased to 58.5% in the year 2009 and rests stable today at 58.0 %. In terms of forest share, Slovenia ranks third among EU-28 countries, behind Sweden and Finland.

F-gas emissions from leaks from stationary installations increased significantly in 2022 due to a significantly higher use of refilled refrigerants. This represented a significant deviation from the indicative target for reducing emissions from the use of F-gases under the EU F-gases Regulation. Compared to 2015, F-gas emissions from leaks were 17% lower in 2022, while, according to the F-gases Regulation, they should have been lower by 55%.