European Union representation within those institutions, a practice often referred to as "pooling of sovereignty". To become a member, a country must meet the Copenhagen criteria, defined at the 1993 meeting of the European Council in Copenhagen. These require a stable democracy that respects human rights and the rule of law; a functioning market economy; and the acceptance of the obligations of membership, including EU law. Evaluation of a country's fulfilment of the criteria is the responsibility of the European Council. No member state has yet left the Union, although Greenland (an autonomous province of Denmark) withdrew in 1985. Article 50 of
History of Greenland the local population, as it would be targeted in the event of nuclear war. From 1948 to 1950, the Greenland Commission studied the conditions on the island, seeking to address its isolation, unequal laws, and economic stagnation. In the end, the Royal Greenland Trading Department's monopolies were finally removed. In 1953, Greenland was raised from the status of colony to that of an autonomous province or constituent country of the Danish Realm. Greenland was also assigned its own Danish county. Despite its small population, it was provided nominal representation in the Danish Folketing. A plantation of exotic arctic trees was