Germany, officially the Federal Republic of Germany (German: Bundesrepublik Deutschland) is a country in Central Europe. It is bordered to the north by the North Sea, Denmark, and the Baltic Sea; to the east by Poland and the Czech Republic; to the south by Austria and Switzerland; and to the west by France, Luxembourg, Belgium, and the Netherlands. The territory of Germany covers 357,021 km² and is influenced by a temperate seasonal climate. With over 82 million inhabitants, it comprises the largest population among the member states of the European Union and is home to the third-highest number of international migrants worldwide. Germany is a federal parliamentary republic of sixteen states (Bundesländer). The capital and largest city is Berlin. Germany is a member of the United Nations, NATO, the G8, the G4 nations, and signed the Kyoto protocol. It is the world's third largest economy by nominal GDP and the largest exporter of goods in 2007.