Smokers in France are still reluctant to stub these out for good despite all the evidence about how they damage your health.
Yet, they're finding it increasing hard to find a place to puff away.
It is estimated that at least half a million French people have no turned to "electronic cigarettes".
But studies found small traces of poisonous substances in e-cigarettes prompting the French health minister to order an investigation.
Al Jazeera's Jacky Rowland reports from Paris.
