I would agree there is no such thing as zero emissions for anything.
However the consensus seems to be that even electricity generated by an old coal fired generating plant creates less emissions when used by an electric car than any internal combustion gas or diesel car on the road.
That being said it is hard to know what to believe these days, lithium producers will say one thing some other vested interest will day another.
You can't even trust photos or videos these days because they can all be faked.
The information age has turned into the misinformation age.
So little emissions are being made by the choked out ICE engines these days that there is basically no difference. The only thing to do to lower emissions nowadays is to go after China and India and make THEM lower THEIR emissions...
