The Department for Transport, in association with What Car?, have developed a ranking system that helps buyers find the most environmentally friendly vehicle.
Click here to find out more
http://actonco2.direct.gov.uk/actonco2/home/on-the-move/car-emission-comparison-tools.html
What Car's list of greenest cars are as follows:
Greenest Superminis
1 Smart Fortwo Coupe 0.8 cdi
88g/km VED Band A
83.1mpg
2 Ford Fiesta 1.6 TDCi (90PS)
98g/km VED Band A
76.3mpg
3 Seat Ibiza 1.4 TDI Ecomotive
98g/km VED Band A
76.3mpg
4 Toyota iQ 1.0
99g/km VED Band A
65.7mpg
5 Volkswagen Polo 1.4 TDI BlueMotion
99g/km VED Band A
65.7mpg
For more information on what to look for when buying a new car check out the following link:
http://actonco2.direct.gov.uk/actonco2/home/on-the-move/buying-your-car.html