In 2016, the U.K. narrowly voted to leave the European Union. There’s a slim chance this break up won’t happen, and U.K. residents are protesting their desire to remain en masse. But what is the E.U. and who cares if the U.K. leaves?
Read MoreOut of Europe’s 50 countries, 28 are part of the European Union, but not all of them have signed on to the euro, the common currency. Here’s a list of the 19 countries that use the euro, and the ones that don’t.
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