The calculation wasn't straightforward though. And varies widely by locale.
EV mileage is reported in eMPG. Which means, "The miles you get when you charge the battery with the same energy as is in a mile of gasoline." The problem is that to deliver that much to the battery, you have losses at the charger, losses in the grid, and losses during power generation. None of which are counted in that figure. If your electric car is running off of a coal power plant, that 120 eMPG Tesla can easily perform about like a 30 MPG Camry. But as soon as you have a significant fraction of your grid being generated by renewables, now the electric car is running on a fraction of the CO2 emissions of the gas car.
All these needs to be cut down and EV won't help us. People need to be able to reach safely schools, workplaces, shops, restaurants by foot or by bike regardless of their age and fitness level.
What we help us is better infrastructure for non motorized vehicles, better public transport (even if they are not financially profitable), walkable spaces, security (with a density of human presence making sure we are safe, not useless cameras), transforming suburbs, commercial and social areas so there is no physical separation anymore between people and where they need/want to go and spend time, effectively bringing back the village/small town paradigm.
EV goes way way way way down the list and we should focus first on EV for public transport and transportation of good rather than personnal toys and vanity possession.
