Biomass is an industry term for getting energy by burning wood, and other matter

Biomass is an industry term for getting energy by burning wood, and other organic matter. Burning biomass releases carbon emissions, around a quarter higher than burning coal, but has been classed as a "renewable" energy source in the EU and UN legal frameworks, because plants can be regrown.[1] It has become popular among coal power stations, which switch from coal to biomass to comply with the law. Biomass most often refers to plants or plant-based materials that are not used for food or feed, and are specifically called lignocellulosic biomass.[2] As an energy source, biomass can either be used directly via combustion to produce heat, or indirectly after converting it to various forms of biofuel. Conversion of biomass to biofuel can be achieved by different methods which are broadly classified into: thermal, chemical, and biochemical methods.

*wikipedia