The Honda Civic 1.4 IMA Executive is the greenest car on Britain's roads for the second year running, according to the Environmental Transport Association's Car Buyers' Guide 2006.

The guide, which highlights the best and the worst cars in terms of their impact on the environment, is published on line at www.eta.co.uk by the Environmental Transport Association, the ethical alternative breakdown service.

Honda's environmentally superior hybrid car offers a practical and stylish solution for those wanting to avoid the congestion charge and help the atmosphere with lower carbon emissions.

Next, the Toyota Prius 1.5 Hybrid is the most efficient mass produced car on the market, says the ETA, with 66 mpg and CO2 emissions making it the lowest of all cars at only 104g/km.