If this is the case and the source of energy is unclean, then how does it compare to its ICE counterpart in terms of CO2 output? I will need to lookup the sour

If this is the case and the source of energy is unclean, then how does it compare to its ICE counterpart in terms of CO2 output? I will need to lookup the source, but electricity generated by fossil fuel sources are to a certain degree dirtier than just using the fossil fuel source directly in the vehicle.