Ok, so obviously it’s far greener to use public or human-powered transport but if you have to drive, what’s better: to drive a more-energy-efficient new car (I’m thinking a standard petrol/diesel car, not an electric or hybrid one) or fix up and use an old car instead?

I suspect it’s a balance of unnecessary consumption and waste versus ongoing inefficiency – but does anyone have any details about which is the better option? Are there any other benefits to a new car than that?

Does the amount of miles you do make a difference? And what about the electric or hybrid cars – do they swing the balance in the favour of a new car, despite the resources it takes to make them?

I would love to hear what everyone thinks about this.

(Photo by cwcav, c/o sxc.hu)