Why not taking two seconds to look it up before making such a false statement? From Wikipedia:
> Citizens of Greenland are full citizens of Denmark and of the European Union. Greenland is one of the Overseas Countries and Territories of the European Union and is part of the Council of Europe.
> Citizens of Greenland are full citizens of Denmark and of the European Union. Greenland is one of the Overseas Countries and Territories of the European Union and is part of the Council of Europe.
https://en.wikipedia.org/wiki/Greenland