I'm not sure about this John. I'm all for keeping car use to an absolute minimum. More car sharing, public transport, walking (how many mums drive a 5 minute walk to school?) and getting on your bike. I'm all for pedestrianising all town centres too to stop those lazy sods driving a few minutes into town to do their shopping.
It's down to the comsumer to opt for greener transport and fuel, I know, I know I drive a great big gas guzzling diesle Range Rover, but I'm trading it in soon for something a bit kinder to the environment