Do new EU members have to join the euro?

Related questions

1. How much is a taxi from Copenhagen Airport to City Centre?
2. Is Denmark an expensive country?
3. Is Helsinki safe?
4. Do taxis in Copenhagen accept credit cards?
5. Is it safe to walk around Copenhagen at night?
6. Is the tap water safe to drink in Copenhagen?
7. Does everyone in the EU use the euro?
8. Do taxis in Copenhagen take euros?
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10. Does Finland use euros?

Tags

1. #claim
2. #these
3. #areas
4. #adopt
5. #after
6. #members
7. #membership
8. #union
9. #countries
10. #currency
11. #policy
12. #denmark
13. #european
14. #include
15. #negotiated