Draft:The Green stuff

Grasses, or Poaceae or Gramineae, are a large and widely spread family of flowering plants. This family includes cereal grasses, bamboo, natural grassland grasses, and species found in lawns and pastures. The latter are commonly known as grass. Grasses have hollow stems except at the nodes and narrow alternate leaves borne in two ranks. The lower part of each leaf encloses the stem, forming a leaf sheath. The leaf grows from the base of the blade, which is an adaptation that allows it to cope with frequent grazing. Grasslands such as savannah and prairie, where grasses are dominant, are estimated to comprise 40.5% of the land area of the Earth, excluding Greenland and Antarctica.

Trees are woody plants that can regenerate their limbs and skin independently. Although trees represent Earth's terrestrial biomass, their fundamental importance for the existence and diversity of life on Earth may not be fully appreciated. The word tree often connotes massive, complex structures that are ubiquitous in our everyday lives. The plant kingdom, or Plantae, encompasses all multicellular eukaryotic life forms that use photosynthesis to produce chemical energy from water, minerals, and carbon dioxide with the help of pigments and the radiant energy of the Sun. Plant cells contain cellulose in their walls, making them somewhat rigid and allowing for unrestricted growth at localized regions. Plants lack organs of locomotion and thus live a more or less stationary existence.