Three out of every five drivers in France run their cars on diesel. But the fuel has just been classified as carcinogenic by the WHO. The fine particles that are emitted by diesel are responsible for 42,000 premature deaths a year.
Ecologists are calling for a rise in tax to make it the same price as petrol, as well as banning it from city centres.
Faced with this threat, diesel car manufacturers have proposed a solution.
AFP TV reports