http://www.eia.doe.g...ecss_diagram.html
27.8 of all energy sources is supplied to transportation via oil we would have to not quite double current gas extraction to replace gasoline completely provided the money is spent on delivery infrastructure. A tax structure for roads would need to be factored into the ng price to be collected at delivery points. Wouldnt be terribly cheaper than gas but would be incredibly cleaner on the atmosphere.
that is a huge benefit
thanx,
bill