I have tried to find it just now, but once a study was done which found that the passengers on a Melbourne Tram which is full would be making less hydrocarbons in the atmosphere if they all drove a V6 commodore each when compared to the coal fired power the tram uses.
It would be great to read that, I'm surprised as I thought trams were a bit more energy efficient, even though coal is pretty polluting. BUT I'm pretty sure its better to have 60 people in a tram in Sydney road Brunswick at 4.30 in the afternoon, rather than 60 commodores stretching back block after block...
Im really excited about how the future of transport will look, I don't think that tying to plonk that technology in our current version of a car is the right way to go. Im pretty sure the first cars were a very poor fit to replace the horse/bullock/people power that people were use to.
I know most of our power still comes from coal, or if you live in some parts of Australia (Alice Springs) Gas. we will get better, we have to get better at creating cleaner power, and when we do it will be great to have some electric vehicle options that are developing. We have a moderate solar system on the roof, and easily are net producers over the 12 mth cycle, and its dead easy. A small upgrade to this and I could easily power an electric vehicle or two.....