No Regrets: the cost effectiveness of reaching average 120g/km CO2 for new cars

More specifically, the paper assesses upfront technological costs and paybacks in fuel savings resulting from technical measures necessary to achieve the long-standing objective of 120 grams of CO₂ emissions per kilometre for new cars sold in the EU by 2010 at the latest. [A note from Transport and Environment (T&E) to the CARS21 working group on the ‘Integrated Approach’]