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Biomass is renewable organic material that comes from plants and animals.
Biomass sources for energy include:
- Wood and wood harvesting and processing residues and wastes—firewood, wood pellets, and wood chips, lumber and furniture mill sawdust and waste, and black liquor from pulp and paper mills
- Agricultural crops, residues and waste materials—corn, soybeans, sugar cane, switchgrass, woody plants, and algae, and crop and food processing residues—mostly to produce biofuels
- Biogenic materials in municipal solid waste—paper, cotton, and wool products, and food, yard, and wood wastes
- Animal manure and human sewage for producing biogas/renewable natural gas