Pollution-Persistent Organic Pollutants, Air Pollution-Sulphur 85, Air Pollution-Sulphur 94, Air Pollution-Volatile Organic Compounds, Antarctic-Environmental Protocol, Antarctic Treaty, Biodiversity, Climate Change, Climate Change-Kyoto Protocol, Desertification, Endangered Species, Environmental Modification, Hazardous Wastes, Law of the Sea, Marine Dumping, Nuclear Test Ban, Ozone Layer Protection, Ship Pollution, Tropical Timber 83, Tropical Timber 94, Wetlands, Whaling Signed, but not ratified: none Natural hazards Flooding through rivers after heavy rainfall, such as during the 2002 European floods, or storm surge, such as the North Sea flood of 1962 and the historic floods of 1362 and 1634 that changed the coastline of what is now the west coast of Schleswig-Holstein. Flora and fauna Phytogeographically, Germany is shared between the Atlantic European and Central European provinces of the Circumboreal Region within the Boreal Kingdom. The territory of Germany can be subdivided into two ecoregions: European-Mediterranean montane mixed forests and Northeast-Atlantic shelf marine. The majority of Germany is covered by either arable land (33%) or forestry and woodland (31%). Only 15% is covered by permanent pastures. The plants and animals of Germany are those generally common to central Europe. Beeches, oaks, and other deciduous trees constitute one-third of the forests; conifers are increasing as a result of reforestation. Spruce and fir trees predominate in the upper mountains, while pine and larch are found in sandy soil. There are many species of ferns, flowers, fungi, and mosses. Fish abound in the rivers and the North Sea. Wild animals include deer, wild boar, mouflon, fox, badger, hare, Eurasian lynx, and small numbers of beaver. Extinct/endangered animals include gray wolf, brown bear, and European bison. Various migratory birds cross Germany in the spring and autumn. The national parks in Germany include the Wadden Sea National Parks, the Jasmund National Park, the Vorpommern Lagoon Area National Park, the Müritz National Park, the Lower Oder Valley National Park, the Harz National Park, the Saxon Switzerland National Park and the Bavarian Forest National Park. Germany is known for its many zoological gardens, wildlife parks, aquaria, and bird parks. More than 400 registered zoos and animal parks operate in Germany, which is believed to be the largest number in any single country of the world. The Zoologischer Garten Berlin is the oldest zoo in Germany and presents the most comprehensive collection of species in the world. Human geography Demographics With an estimated 83.2 million inhabitants in December 2020, Germany is the most populous country in