> they get their number by considering how much gas would have been used if all the miles driven by EV had instead been driven by a similar gas-consuming vehicl

> they get their number by considering how much gas would have been used if all the miles driven by EV had instead been driven by a similar gas-consuming vehicle. That wasn't clear to me from the article. I gathered (incorrectly) that the numbers were based off amount of gasoline sold. Thanks for the clarification.