First of all, coal plants are vastly^H^H^H^H^H^Hsomewhat more efficient than gas-fueled car engines. Secondly, the electrical grid acts like a technology buffe

First of all, coal plants are vastly^H^H^H^H^H^Hsomewhat more efficient than gas-fueled car engines. Secondly, the electrical grid acts like a technology buffer. In the future, those coal plants can be replaced by water, wind, solar or something else, without changing the grid or the vehicle charging network.