information:classification, structural:summarization, stylistic:style_transfer
Unilateral direct usage

The euro has been adopted unilaterally as the sole currency of Montenegro and Kosovo. It has also been used as a foreign trading currency in Cuba since 1998, Syria since 2006, and Venezuela since 2018. In 2009, Zimbabwe abandoned its local currency and introduced major global convertible currencies instead, including the euro and the United States dollar. The direct usage of the euro outside of the official framework of the EU affects nearly 3 million people.