Diesel cars could rise in price because of stricter regulations on engine emissions.
This week, the European Parliament is voting on tough new air quality laws - the Euro V and VI emissions standards - which, if passed, could add significantly to the cost of manufacturing diesel cars. Some experts say it could add up to £600 to the price of a new diesel car.
Among the costly parts of the new emissions regulations is a requirement that every new diesel car would have to have a particulate trap fitted.
The concern is that, because of the predicted rise in price in diesels, buyers would choose petrol cars, which can be up to 30% worse for fuel consumption and which emit more carbon dioxide.
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