Temperature observations show increasing trend of maximum and minimum absolute temperature in between 1961 and 2022, reflecting a global warming. Number of hot days is increasing, including the frequency of extreme hot days with daily maximum temperature above 35 °C. In the summer of 2013, the highest temperature so far was measured in Slovenia, and local temperature records were observed at many meteorological stations. A record number of hot days was observed in 2022. Number of days with temperature below zero show a decline.

In 2023, around 182 million pieces of plastic carrier bags were placed on the Slovenian market, of which 99% were those with a wall thickness of less than 50 microns (light plastic carrier bags). In Slovenia, the consumption of lightweight plastic carrier bags amounted to 85 bags per capita in 2023 In the same year, 145.9 million pieces of single-use food containers made wholly or partly of plastic and 174.4 million pieces of single-use beverage cups made wholly or partly of plastic were placed on the Slovenian market.

In the period 2003-2024, the highest exposure to ozone concentrations were detected in the Primorska region in summer where air quality measuring stations in Koper and Nova Gorica Grčna detected highest ozone concentrations in ambient air. There are some differences from year to year in a level of ozone exposure due to meteorological conditions in the warm half of the year and other regional characteristics.

Slovenia is building its tourism development around sustainable principles — preserving nature, supporting local communities, and creating high-quality experiences. Tourism in Slovenia achieved high growth again in 2024 and 2025. At the same time, the implementation and expansion of the Green Scheme of Slovenian Tourism, a national certification program, is being strengthened, which now includes more than 280 label holders under the umbrella brand SLOVENIA GREEN and introduces new areas (culinary, digital monitoring of indicators, pilot circular practices).

Lyme borreliosis (LB) and tick-borne encephalitis (TBE) are the most common vector-borne diseases transmitted by ticks. Between 2014 and 2023, Slovenia reported annually slightly less than 3,000 to over 7,000 cases of LB and an average of 105 TBE cases (the highest in 2020 - 187 cases, the lowest in 2015 and 2021 - 62 cases). Due to climate change, which influences the expansion of tick habitats and extends their activity season, the risk of infection may increase in the future. Increased awareness and individual prevention are key factors in reducing the burden of both diseases.