Biomass is a renewable energy resource that is generally found in nature in the form of agriculture and forest residuals and energy crops. Though it can also come from byproducts of industries or Urban areas. Biomass as a source of energy is attractive, in view that it does not add on to the greenhouse gas, as it adds little to no carbon emissions on a lifecycle basis.
As a natural resource, biomass is continuously being formed via the interaction of air, water, soil and sunlight. When left alone, it is deconstructed again by microorganisms into its chemical elements: water, carbon dioxide and energy in the form of heat.
There is more than one billion tons of biomass that can be converted into fuel annually, from the U.S alone.