One detail usually overlooked with having a fleet of electric cars is the added weight of the battery and the extra wear and tear this will create on our highways. There is a rule of thumb that says that highway damage goes up by the 4th power of the axle weight. So an electric car that is 33% heavier than the an ICE car, will cause (4/3)^4 = 3.16 times as much damage. So if we all go to electric cars and if batteries do not become lighter, then expect road to not last as long. Also, concrete production itself is a serious CO2 source.