Biomass can be defined as material of biological origin excluding material embedded in geologic formation and/or fossilized. This definition refers to the short carbon cycle, the life cycle of biological materials (e.g. plants, algae, marine organisms, forestry, micro-organisms, animals, and biological waste from households, agriculture, animals, and food/feed production).
The Earth’s biomass represents an enormous store of energy. It has been estimated that about one eighth of the total biomass produced annually would provide all of humanity’s current demand for energy. Furthermore, since biomass can be regrown, it is a potentially renewable resource.