History of the North Sea great herring fishing industry resulting in Scotland becoming a European leader in that industry. During the First Schleswig War (1848–51), the Crimean War (1854–56) and the Second Schleswig War (1864), belligerents took steps to reduce or eliminate commerce in the North Sea by their enemies. In the first Schleswig War, Denmark was able to halt maritime commerce by Germany in the North Sea and in the second, imposed tolls on ships crossing through the Danish straits between the Baltic and North Seas. The Crimean War saw British and French expeditions sent into the Baltic to prevent Russian ships' egress into
World Network of Biosphere Reserves in Europe and North America of the World Network of Biosphere Reserves. The list does not include the "Intercontinental Biosphere Reserve of the Mediterranean", a biosphere reserve shared between Morocco and Spain, which has been classified as part of the Arab States region. "See also: " See also Portugal and Spain. See also Romania and Ukraine. World Network of Biosphere Reserves in Europe and North America Under UNESCO’s Man and Biosphere Reserve Programme, there are 302 biosphere reserves recognized as part of the World Network of Biosphere Reserves in Europe and North America (as of April 2016). These are distributed across 36 countries in the