Most car pollution is via use, not production. EVs are cleaner, much cleaner - regardless of grid production.

To be precise, more than 85% of a gas-powered vehicle’s lifetime emissions come from using the car, not from building the car. That’s according to researchers at Argonne National Laboratory. And that means the new EV, despite its manufacturing costs, will be cleaner over time. - Source

It makes sense if you think about it, what’s more likely to be more efficient (and hence cleaner), burning fossil fuels in a large facility, or in a bunch of your tiny engines? As we shift to a cleaner grid, that inefficiency gets larger.

Obviously, if we can shift to more public transit, we can get even cleaner, but any replacement is helping.