There is a clear opportunity to improve new car fuel economy 30% by 2020 and 50% by 2030, in a cost-effective manner (. low or negative cost per tonne of CO2). Improving the efficiency of new cars at this rate would make possible a 50% im- provement in the average fuel economy of all cars on the road worldwide by 2050. This view is supported by academic engineers and the car manufacturing industry, as presenta- tions at the 2008 International Transport Forum in Leipzig suggested5 , and by the analysis presented in the IEA’s report, Energy Technology Perspec- tives 2008 (IEA, 2008). Professor Julia.
