Reacting to figures from the Society of Motor Manufacturers and Traders that show the new car market in the UK is in decline, RACCars.co.uk spokesman Rod Dennis said:
"From an air quality perspective, these latest figures are a mixed bag. There is encouraging growth in the alternatively-fuelled vehicles sector but this still represents a fraction of overall sales.
"The decline in new diesel sales however is stark - while the modest growth in petrol sales shows that some owners may be moving from diesel to petrol, it could also be evidence that diesel drivers are choosing to hold on to their current vehicles for longer when faced with uncertainty over future diesel taxes and charges.
"We believe drivers need to be offered more incentives to switch into alternatively-fuelled vehicles to encourage swifter uptake of the very cleanest vehicles available."