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Where will all the electric cars be charged?
(www.bbc.co.uk)
This is a most excellent place for technology news and articles.
The footprints of chargers and gas stations aren't the same though. A lot of places I go have a row of 8-10 spots with chargers. No added footprint really, just installed at the front of the spot. Compare that to an 8-10 pump gas station, even without a convenience store. If you removed a gas station and replaced it with rows of spaces with chargers I think you'd get more cars through over a given period of time.