Q. Has the European Union been effective in representing the diverse populations of the Euro-zone?

This isn't a question with a definite "Yes" or "No" answer.  To answer it, you will need to find and read materials about the subject and reach your own conclusion.  You can use library resources to learn about the subject.

For books, follow the link below to the library's catalog, OneSearch and search for European Union.  There are some books and a lot of eBooks on the subject.

For articles, follow the link below to our databases guide for Current Events.  The databases under this subject are likely the best for finding material about this subject.

Among those databases, CQ Researcher and Issues & Controversies are both good for getting articles that give overviews of the subject and common arguments made about it.  For more detailed articles, Gale Academic OneFile is a good place to search.  You can retrieve articles about the European Union by searching for "European Union".  This will retrieve thousands of articles.  You can reduce this number by using the options on the right (full text, source type, publication date, subtopic, etc.).  You also can make your search more specific by adding additional search criteria, like "EUROZONE" AND "European Union".

There are also some videos on Films on Demand about the European Union that you may find useful.  You can reach Films on Demand through the link below.