Encouraging people to buy greener cars is key to reducing CO2 emmissions from transport in the short term. New research from Canda finds that cost, puchase tax reliefs and low emmission rates are most likely to encourage households to make the step towards owning a greener vehicle. Contray to current thinking in the UK, free parking and access to car share lanes is not expected to have a significant impact on peoples green purchasing decisions. Fuel availability is much more likely to be a key concern. The RAC Foundation is keen to promote the benefits of green vehicles and this type of research really helps as it highlights what is needed to get the public interested in next generation of vehicles.