Brilliant!Then everyone will stop going into towns,and farms can turn into retail outlets, and crops/cattle etc can be grown/ reared on the multitude of window boxes available in the nice clean towns!In urban areas air quality is a big health concern. But out in the sticks diesels still take a lot of beating even from an environmental standpoint. Personally I think the government should go for differential congestion charges to promote electric vehicles rather than punitive Rises in fuel duty which punish rural users.