byegad wrote:An individual's overall carbon footprint is rather like a smokers view of secondary smoke induced lung cancer or a dog owners view on dog mess. Tailored to justify their own view. The simple step is to take the approach California took in the 1970s on car pollution. They enacted a law and let the manufacturers worry about how to meet it. IIRC at one point in downtown Los Angeles to meet the new emmissions law a cars exhaust had to emit cleaner air than it was taking in! Clearly impossible but technically that was what was being asked for!
Strangley enough car emmissions did come down and car induced smog was reduced.
What we need is not a limit on 4.2l engines but a minimum mpg for all private cars. if ALL new cars had to meet a minimum 40mpg standard this year and 42mpg next and so on to say 70mpg in 15 years time the manufacurers would meet it. Then 4.2 litre engines would become a thing of the past!
You're right that real behaviour change has to be supply-led. If 4.2 litre engined vehicles are on general sale to the public, then those rich enough to buy them will.
Reading your post, I am reminded about something I once read about the Honda motor company in the 1970's (mainly manufactured motorbikes back then) and how they responded to the legislation in California and used it as an opportunity to build smaller, more efficient engines than the traditional US car manufacturers, and so successfully enter the US car market whilst the competition were busy lobbying congress against the legislation.
Our capitalist world is based on consumption - unless we are willing to change our Western economic and political system, then we will continue to consume at rediculous levels. Therefore, we need to make sure that the goods and services supplied to the market are as environmentally friendly as possible, otherwise nothing will change.