Eco-motoring 'can reduce carbon'
Motorists should be taught new driving techniques to reduce carbon emissions from their vehicles, a report suggests.
A report by the Commission for Integrated Transport also suggests new rules to ensure drivers can only buy the most fuel-efficient cars.
It also wants new cars to be as environmentally friendly by 2020 as the greenest cars which are currently available on the market.
The CfIT is the body which advises the government on transport.
BBC transport correspondent Tom Symonds said cars and lorries are the biggest source of carbon emissions in the UK.