I’m an advocate for car-free cities (on this note, see the newly published Carfree Design Manual by J. H. Crawford). But 100% electric cars are certainly preferable to gasoline-powered cars. Therefore I found this recent presentation by Shai Agassi of Better Place to be of inspiring. He argues that hybrids won’t work, and ethnol isn’t feasible. He says cars need to be run on 100% electric power derived from clean energy sources (i.e. wind, solar).