![Tesla Model S at Supercharger site in Ventura, CA, with just one slot open [photo: David Noland]](http://images.hgmsites.net/tmb/tesla-model-s-electric-car-road-trip-upstate-new-york-to-southern-california-photo-david-noland_100500011_t.gif)
For years, electric-car skeptics raised concerns about what was cleverly dubbed "The Coal Tailpipe": the idea that plug-in vehicles produced just as many harmful emissions as gasoline cars, but in a different place. That's not remotely true for carbon dioxide, as multiple studies over the years have shown, though it is in limited cases for a small...