Air quality in urban areas is a growing challenge in Slovenia. Air pollution can be significantly reduced by making public passenger transport greener. In the municipality of Ljubljana SE decided in 2011 to introduce a fleet of compressed natural gas buses with the help of the Slovenian Public Fund for the Environment, which offers subsidies for the purchase of public passenger transport vehicles powered by natural gas.

The existing road freight traffic causes high emissions of particulate matter, nitrogen oxides (NOx) and greenhouse gases and therefore contributes greatly to air pollution. The solution that the Government of Slovenia has decided to take is CNG. Its use in freight transport provides significantly lower fuel costs (compared to petrol or diesel) and has a significant impact on the maintenance costs of vans and trucks. Diesel engines can also be converted to use CNG, which gives rise to so-called bivalent engines, which can use two fuels, that is, diesel in addition to CNG.

In recent times, biogas has gained increasing importance in the field of alternative energy sources in Slovenia. Currently, most of it is produced in Slovenia in cogeneration units (co-production of electricity and heat) on family farms, landfills, waste treatment plants since biogas can be produced by practically all organic materials containing a carbon/carbon ratio. satisfactory nitrogen.

Likewise, the use of BioCNG in Slovenia may have the virtue of stabilizing the price of CNG in Slovenia by not depending on importing natural gas from other countries but rather being a local production.