CO2 gulf between old and new cars widens

Figures by the SMMT demonstrate that the average new car is now 18 percent more efficient than the average car on the road, showing just how far car companies have come in the battle to lower emissions.

Since the year 2000, new car emissions (as in, the average CO2 emissions of all the cars sold) have fallen by 23%; in 2011, emissions dropped by a significant 4.2% compared to 2010.