Biomass energy comes from organic material from plants and animals. Plants produce biomass through photosynthesis, storing the sun's energy. Biomass can be burned to produce heat, which is then used to create steam to power turbines and generate electricity. Different types of biomass include firewood, wood pellets, and charcoal. Biomass is a renewable source of energy since plants and crops can regrow, but burning biomass does release carbon dioxide pollution.