Volt/Prius/etc. All have a GASOLINE_BURNING ENGINE in them. Batteries are only an 'auxiliary' or Booster for that, so the 2-3 cylinder lawnmower engine can have some Help going up Hills (or in Hot or Cold Weather for Heat and A/C) And, if you 'plug in' the Battery to Charge it, well, that Coal-Burning Power plant is Out-of-Sight, Out-of-Mind, right?
And, if you 'plug in' the Battery to Charge it, well, that Coal-Burning Power plant is Out-of-Sight, Out-of-Mind, right?