Quote:
Originally Posted by Tim
Well, in fact we are far more efficient in the use of energy than we were in the 70s: about twice as efficient.
|
US corporate average fuel economy (CAFE) from 1975 was 18mpg.
US corporate average fuel economy for 2006 is 27.5mpg
That's a rise of 52.78% over 31 years, an average increase of 1.7% in fuel efficiency per year which is less than the average increase in US fuel demand (2% per year) during that period of time.
That's a long way from "double".
Source