No , if you run EVs off a grid fossil fuel generator, that’s the difference between 33% and 40% efficient. It’s not enough to move the needle. It doesn’t even pay for itself in terms of emissions.
The energy source absolutely has to be ZERO emissions as well. If not then it’s just climate cope.
That is nowhere near enough. It’s 33% versus 40% difference between co2/kWh . we need zero co2/kWh or else it’s all a waste of time.
It’s only acceptable if we are transitioning to zero emission grid. If we stay on natural gas then it won’t even move the needle.