A Grassland is a is a type of Habitat or Biome which is dominated by Grasses and other Herbaceous (non-woody) Flowering Plants and a variety of scattered Trees and Bushes. Grasslands occur in areas where there is not enough regular rainfall to support the growth of a Forest, but not so little as to form a Desert. About one quarter of the Earth's land is covered with Grasslands. Grasslands may occur naturally or as the result of human activity. Grasslands created and maintained by human activity are called 'Anthropogenic Grasslands'. Those formed naturally are called 'Natural Grasslands'.