Just because it uses less fuel doen't make it green. It is the overall cost of making it etc etc etc.
At the end of the day the costs are much higher than you might imagine.
Like I said, I am involved with Taxis and they have the advantage of acelerated testing as they will do in a year what a family car does in five.
I wouldn't touch one with a barge pole knowing what I know.
About 10% of the Cairns fleet are Prius and Camrys less than six months old and are no better and no different to the others.
Don't be conned by sharp talking salesmen would be my advice.