Europe covers about 10,180,000 square kilometres (3,930,000 sq mi) or 2% of the Earth's surface and about 6.8% of the planet's total land area. It hosts a large number of sovereign states (ca. 50), whose precise number depends on the underlying definition of Europe's border, as well as on the inclusion or exclusion of semi-recognized states. Europe contains parts of Russia, the world's largest country by area and Europe's largest by area and population, as well as the Vatican, the smallest country on both counts. Europe is the third most populous continent after Asia and Africa with a population of 731,000,000 or about 11% of the world's population. According to UN population projection (medium variant), Europe's share will fall to 7% in 2050, numbering 653 million.[2] However, Europe's borders and population are in dispute, as the term continent can refer to a cultural and political distinction or a physiographic one.










