Poland is already the member of EU since 2004. Both EU and Poland seem to be happy about that.
Yes it is.
The economy would most likely grow and the EU would become more powerful.
Yes, Poland is a part of the EU.
EU citizens don't need a passport to go to Poland, all other people do. Some also need a visa.
For the EU citizen, to travel inside EU (like from Ireland to Poland) a valid ID is required, but not necessary a passport.
Poland is just in middle of Europe. The country is also a member of EU and insurance conditions are equal in all EU.
They are European countries and members of EU; but Romania and Poland are very different countries.
Poland is in the better geostrategic position, and has the superior economy and military. Belarus has the Russian federation backing them up, while Poland would have the EU. My predicition would be a western victory, but Poland itself would probably face invasion and occupatin by their enemies. Those two alone, however, would result in a Polish victory
Poland became a member of the EU on 1 May 2004.
As a member of EU Poland doesn't require visas for American Citizens (as I assume u are).
Yes, but EU rules say that you have to be treated no differently than a UK citizen.