This is entirely false. It's called the long tailpipe theory. Every study that suggests this conclusion was published by Oil companies in the 90s to shut down

This is entirely false. It's called the long tailpipe theory. Every study that suggests this conclusion was published by Oil companies in the 90s to shut down California's effort to switch to electric cars by the year 2000. No actual study has ever found this conclusion and in fact all find the opposite. Even with the worse polluting power generating plants, charging an EV directly off of the massive grid power generation is far more efficient in terms of pollution than burning gas inside your car.