> so the sooner that can switch over the electric, the sooner we can drop the 36% of energy being sourced from petroleum.

but it's not a 1:1 relationship. A lot of electricity in the US comes from burning petro-fuels like natural gas (if you count natural gas as a petro fuel) or coal.

There was a study[1] last year that argued that driving a Tesla in Ohio caused more pollution than driving a BMW 3-series, because the source of the Tesla's electricity was likely coal.

1: https://www.scientificamerican.com/article/electric-cars-are...