I am no Eco warrior, more just an Eco Worrier, and I conclude that if all cars and other road transport, as well as everything else (boats, planes and so on) were as clean as pedal bikes, then I'd have no problems with it.
Don't get me wrong, Gl*bal W**ming is one thing, but I'm actually talking about simply cutting the amount of pollution as a whole so that things are more cleaner. It's a no brainer, really and I applaud those who are finding alternative forms of fuel and power for their vehicles (just as long as it doesn't do damage in some other way that is), as well finding cleaner energy as a whole for our heating etc.
I conclude that trains also produce pollution, and steps are being taken in the industry, but still, a train carrying several hundred people is surely better than several hundred individual cars on the road??
And just look at the amount of lorries on the roads, it's obscene!
In short, make everything (including trains) as clean as possible and I wont be so bothered about it!!
In fact, give me an emission free vehicle and I might just use it ...oh no wait, I already have one, it's called a BIKE!!