Biomass Power: An overview of a renewable and sustainable source of energy Biomass refers to organic matter that comes from plants and animals. Any organic material such as wood, wood waste, straw, manure, sugarcane bagasse, or MSW can be considered as biomass. Biomass contains stored energy from the sun. Plants absorb the sun's energy in a process called photosynthesis and use it to convert carbon dioxide and water into oxygen and energy-rich organic compounds like...