If you are visiting any major city in France you will now need a 'clean air' sticker (a bit like the zones one for the London). They cost as little as £3.20 which in comparison to an on the spot fine of £117 is a big difference.
You can apply on line or via a postal request.
Would highly recommend printing out the confirmation of application should the sticker not arrive in time for your journey as a proof of payment and application.
For further information please see the websites below.