Biomass is organic matter extracted from living organisms.

Burning biomass crops instead of fossil fuels reduces net CO2 emissions, but deprives soil of nutrients that now do not cycle back into the ground.

  1. Firewood can be cut for burning; care should be taken that harvesting is sustainable.

  2. Waste such as cornstalks or manure can be burned.

  3. Composite "briquettes" made from compressed biomass provide portable fuel.