Alternative fuels in public transport and restrictions contained on their use
European transport policy assumes reducing the negative impact of transport on the natural environment and improving the energy efficiency of means of transport. European cities undertake numerous activities aimed at limiting the use of diesel-powered vehicles and introducing solutions free of toxic substances. The first part of the paper is devoted to the attempt to find an answer to the question at what stage of development there are currently low and zero emission vehicles in public transport. The second part will present the current research on the use of low-emission vehicles in public transport on the example of the largest carrier in Poland. The paper presents the results of research and statistics collected since 2015, mainly electric buses running every day on various routes of communication lines in Warsaw.