“…Conventional transport based on diesel and petrol engine presents an environmental-unfriendly mobility inseparable from emission of exhaust gases such as CO, CO2, NOx, SO2, Pb, hydrocarbons and particular matters. According to the European Strategy for low-emission, mobility transport represents almost a quarter of Europe's GHG emissions and is the main cause of air pollution in cities (Konstanciak, 2017). Within this sector, road transport is by far the biggest emitter accounting for more than 70% of all GHG emissions from transport in 2014.…”