You forget that combustion engine requires ancilleries, radiator alcahol coolant,exhast system ,catalytic convertor, gearbox , clutch,, turbos, carburretors, fuel tanks, air filters etc, let alone engine management senders and accomanying electronics.
all those factories heating workers to compliment the combustion engine and those workers using cars to get to work.
A combustion engine not only puts out toxic gases but wasted heat 60% of the fuel is made into unwanted heat.
Rented batteries and an electric motor, thats it.