Electric vehicles are the future of the transport sector. The massive transition from traditional passenger vehicles to electric vehicles will play an important role in the decarbonization of the transport sector and moving toward zero emissions. The main problem will be the generation source of electricity to charge the huge fleet of future electric vehicles. Hence clean and renewable energy sources will play a vital role in making electric vehicles carbon-free. In this paper, the impact of the carbon dioxide emission factor of power systems on electric vehicles has been studied in detail. A carbon dioxide emission comparison has been done for traditional passenger vehicles and electric vehicles. The study has been carried out for three It...