Translate the following English sentence to French:
"The arrival of the euro will also entail a lot of practical questions for consumers. Above all we have to take care that prices do not trail upwards when the currencies are finally changed over."
L'introduction de l'euro comporte beaucoup de questions pratiques qui intéressent les consommateurs : il faudra surtout veiller à ce que les prix n'augmentent pas lorsque les unités monétaires vont changer.