Offering low-carbon alternatives is the best way of encouraging green drivers, the Campaign for Better Transport has said.
Jason Torrance, the campaign director for the group, said that like clean alternatives to coal and gas for homes, the same must be offered to drivers.
"I think that we need a massive boost to the incentives that the government is providing to enable people to choose low-carbon forms of transport such as green cars," he said.
"The solution really lies not in technological fixes, but in providing real low-carbon travel alternatives for people and providing them with the ability to choose not to travel."
He added that the government must invest in "making alternatives cheaper" if it is serious about getting people into greener transport.
According to the RAC, 77 per cent of people claim to have changed their driving behaviour because of the rising cost of fuel.
They also found that 21 per cent did not understand what constituted being a green driver and 27 per cent of people thought that petrol had very little impact on the environment.
