Biomass

Organic matter of plant, animal or fungal origin used as a source of energy after thermal, biochemical or chemical conversion. Energy derived from biomass is deemed to be renewable if it does not entail over-exploitation of resources or have too much impact on biodiversity or soil fertility. Likewise, exploitation or cultivation of the resource (timber, for example) must not be detrimental to other resources, such as the amount of arable land or the availability of water.