The development of cleaner, greener cars has meant that manufacturers have saved five million tonnes of carbon dioxide emissions in the past ten years, according to the Society of Motor Manufacturers and Traders (SMMT).
Research by the organisation reveals that average car emissions have fallen by 22.6g/km since 1997, to 167.2g/km.
Christopher, Macgowan, chief executive of the SMMT, described these developments as "significant progress in cutting CO2".
He added: "CO2 emissions in the UK from cars have actually fallen since 1997, down 3.2 per cent from 72.2 million to 69.9 million tonnes in 2005.
"That’s despite a 16.5 per cent rise in cars on the road from 26.3 to 30.7 million."
SMMT figures reveal that over 2.3 million new cars were sold in 2006 and these vehicles managed to save over 900,000 tonnes of CO2 compared to 2005.
The society has released these numbers in preparation for its annual CO2 report, which will be released on July 6th and cover the 2006 market.