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An immense range of vegetation is found in Asia, the result of the continent’s wide diversity of latitude, elevation, and climate. Natural conditions, however, are not entirely responsible for the associations of trees, plants, and grasses of Asia; natural landscapes have been transformed by more than eight millennia of farming and other human activities. The natural landscape has been least affected by people in sparsely populated North Asia. Vast plains, continentality, and the nearness of the Arctic Ocean explain the presence there of a zone of tundra—cold-tolerant low-lying vegetation in an area of permafrost (permanently frozen subsoil)—similar to that found ...(100 of 38030 words)