The Skagerrak (Danish: [ˈsɡ̊æɪ̯ˀɐʁaɡ̊]; Norwegian: [ˈskɑːɡərɑk]; Swedish: [ˈskɑːɡərak]) is a strait running between the southeast coast of Norway, the southwest coast of Sweden, and the Jutland peninsula of Denmark, connecting the North Sea and the Kattegat sea area, which leads to the Baltic Sea. Skagerrak contain some of the busiest shipping routes in the world, with vessels from every corner of the globe. It also supports an intensive fishing industry. The ecosystem is strained and negatively affected by direct human activities. Oslo is the only large city in the Skagerrak region.