Biomass

Biomass, is a renewable energy source, biological material derived from living, or recently living organisms, such as wood, waste, and alcohol fuels.

Biomass is commonly plant matter grown to generate electricity or produce heat. For example, forest residues (such as dead trees, branches and tree stumps), yard clippings and wood chips may be used as biofuel.

Corn stalks ready to be collected and used as fuel

However, biomass also includes plant or animal matter used for production of fibers or chemicals. Biomass may also include biodegradable wastes that can be burnt as fuel. It excludes organic material such as fossil fuel which has been transformed by geological processes into substances such as coal or petroleum.