17 of the 27 members of the European Union use the Euro, so it could not really be said the EU is united under the Euro.
Switzerland is not in the EU, so it cannot join the Euro area.
Great Britain. Not true, the United Kingdom does not regret joining the Euro.
It has united the europeon nations making their dollars stronger.
It started as "free trade" under the EU. Then it became the government . . . somehow.
euro
Euro
Montenegro and Kosovo are countries that are not in the EU but use the Euro (Kosovo also uses the Serbian Dinar)
The EU is just the European Union. Any countries of Europe can apply to receive EU membership if they qualify. The EU (or Euro) zone is the collection of member countries which share the currency the Euro. The Euro is now compulsory for all EU members, except the UK and Denmark which have opted out but may join in the future.
Denmark did not leave the EU. It is still a member. It does not use the Euro, but that does not mean it is not in the EU. Some other EU countries do not use the Euro. Only 19 of the 28 member countries use it.
The euro is the current Italian currency. Italy is a member of the European Union. Use of the euro isn't a requirement of EU membership. For example, Sweden is an EU member that doesn't use the euro. Italy is an example of an EU member that does.
Yes, their reverse side designs are different for each country, but all are valid all across the Euro area - remember that Sweden, Denmark and United Kingdom are members of the EU, but are not using the Euro (this also goes for most of the new EU members, except Cyprus, Slovakia and Slovenia).
the euro