2. Plant material, vegetation, or agricultural waste that is used as a fuel or as a source of energy: "Efforts are being made to utilize more vegetable matter to produce fuel for all aspects of energy uses."
"Any solid, gaseous, or liquid fuel obtained from biomass may come from natural forms: such as, wood, peat, or a commercially produced form including ethanol from sugarcane residue; and diesel fuel can also be produced from waste vegetable oils."
"Biomass is a collective term for all organic substances of relatively recent (non-geological) origin that can be used for energy production, including industrial, commercial, and agricultural wood and plant residues; municipal organic waste; animal manure; and crops directly produced for energy purposes."
Biomass is can be used to produce biofuel that is made from this organic material.
Biomass is one of the two most common energy sources in the U.S. today, along with hydropower. Forms of biomass, such as wood, can be burned to produce heat and generate electricity.
Agricultural crops can be chemically converted into fuels, such as ethanol and biodiesel. These are the only known renewable liquid energy sources, and may one day replace petroleum and fossil-fuel.
Estimates also exist for the entire global plant biomass and measurements of biomass can be used to study interactions between organisms, the stability of those interactions, and variations in population numbers.
Whenever dry biomass is measured, the material is dried to remove all water before weighing.