“So for now, electric cars are essentially coal-powered cars. Because that is where the electricity currently comes from to charge their batteries. Coal.”
Don’t bend the facts! Coal is only 23%. In some regions 0%.
But now coal's down even below your estimate to 19%. Biggest single source is natural gas at 42%. Nuclear is almost 20%. Combined wind and solar are only 12.8%. Hydro-electric rounds it out at just under 6%.
So I'll rephrase my comment to say that electric cars are essentially natural gas, coal and nuclear powered cars.