Biomass is organic material derived from natural sources like plants and animals. It contains stored energy which is released as heat or other forms of energy when it is burned or processed. Biomass can be replenished over short periods (unlike fossil fuelsFossil fuels are energy sources formed from the remains of ancient plants and animals that lived mil) and naturally absorbs CO2 from the atmosphere, making it a form of renewableRenewable is a term used widely in the energy sector. It essentially refers to something that can be energy. Waste biomass refers to organic materials that are waste products from various industries or processes. Many emerging technologies utilise waste biomass to produce commercially valuable products such as animal free leather, polymers (e.g., collagen, keratin, gelatin), building materials, plastics, and beer.