Biomass is a renewable energy source that includes plants and animals. It can be used to produce heat and electricity. Biomass energy refers to energy from recently living organic matter like plants and animals. There are several ways to convert biomass into energy, including direct combustion to produce heat, thermochemical conversion methods like pyrolysis and gasification, and biochemical conversion using microorganisms like anaerobic digestion and ethanol fermentation. While biomass energy has advantages like being renewable and reducing dependence on fossil fuels, it also has disadvantages like being less efficient than fossil fuels and requiring a lot of space for combustion.