The U.S. produces 15% of the world’s GHGs, transportation accounts for 27% of those emissions, and 57% of transportation emissions come from passenger cars and light duty trucks. That means if every car was an EV with batteries charged from a non-carbon emitting source, GHGs would be reduced by 2.3%. Only 39% of U.S electricity, however, comes from non-carbon emitting sources. Therefore, realistically, if every car in the U.S. was an EV, carbon in the world’s atmosphere would be reduced by less than 1%.
This is a quote from an engineer in a Fox News article.