The problem with electric vehicles, as I think many people fail to realize, is that the largest source of electricity generation in this country is coal, which is in fact dirtier than oil. I misspoke when I said it's impossible to become energy independent. If we invest in renewable energy, solar, wind, hydro, geothermal, etc, I do think it's possible. But merely switching to electric vehicles would in fact make air less clean unless we can change the sources of our energy to these cleaner, continually available sources. Thanks for the correction.