The results of the Energy Efficiency Survey of Slovenia (REUS) 2021 show that 61 % of Slovenian households rarely or never use public transport. Depending on the type of settlements, the largest share of households that use public transport live in Ljubljana and Maribor, as well as in the Obalno-kraška region. A good tenth of those households that use public transport, has used public transport in the recent week, while a fifth of households used public transport in the recent month.

The results of the Energy Efficiency Survey of Slovenia - REUS show that the share of Slovenian households that are ready to start using or increase their use of public transport over the next 12 months remains quite small – a trend has not significantly changed during the 2011-2019 period. The data show that almost a tenth of households are ready, while a quarter of households are considering the option, while more than two thirds are not ready to start using or to increase their use of public transport.

The analysis of results of the Energy Efficiency Survey of Slovenia for the public and service sector (REUS JSS 2020) indicates that less than a tenth of organisations from the public sector and less than a fifth of office-based companies from the service sector (e.g. banks, post offices and other administrative and office premises) believe that energy consumption in their business premises is either low or very low.

The large majority of organisations from the public sector and office-based companies (e.g. banks, post offices and other administrative and office premises) believe that increased energy efficiency of business premises is very important. About three quarters of organisations in both sectors think about using the energy more efficiently. For about a third of organisations from both sectors, which think about the efficient energy consumption, its main purpose is to decrease the quantity of energy used in their business premises.

The large majority of organisations from the public and service sector believe that they are ecologically conscious and that they separate waste. The majority of organisations responded that the efficient use of energy in their business premises is important due to both reducing the costs and to protect the environment. Three quarters of companies and two thirds of public administration organisations have stated that they are well familiar with the environmental impact of their business premises.

The results of the Slovenian Energy Efficiency Survey (REUS) 2019 show that over three quarters of all households decrease their greenhouse gas emissions by walking short distances, about half of them travel by bike, 1 in 7 uses public transport and 1 in 8  uses car sharing. Seven out of ten households were willing to combine their personal vehicle with other forms of transportation in their daily travel.

The estimated value of external transport costs in 2021 is approximately 2.4 billion euros, accounting for 4.6% of Slovenia's GDP. The majority (99%) of these costs are attributed to road traffic, while only 1% is attributed to rail traffic. Two-thirds of external costs arise from passenger traffic, with the remaining one-third from freight traffic. Notably, a third of the external costs of transport are associated with traffic accidents, followed by costs related to congestion (20%), climate change (18%), air pollution (16%), damage to habitats (7%), and noise (6%).

Air pollution is the most important environmental risk factor for human health, affecting an average of 400,000 premature deaths in the EU and costing Europeans an average of more than € 166 billion a year. In the case of the cities of Ljubljana and Maribor, external costs amount to almost EUR 271 million annually. Estimation of external costs of air pollution from transport is slightly decreasing.

Plans to improve air quality in Slovenia include a number of measures. It is crucial that the state ensures the financing of measures and thus the implementation of measures, and consequently the improvement of ambient air quality. In 2019, as much as EUR 15.56 million more investments were paid out than in 2014. In the period from 2014 to 2019, most investments were in wood biomass boilers, followed by investments in heat pumps.