Farm-Based Anaerobic Digestion Practices in the United States – PennState Extension
Farm-Based Anaerobic Digesters – Michigan State University Extension
Potential for Anaerobic Digestion on Livestock Farms in the United States – EPA (United States Environmental Protection Agency)
Decentralized biogas technology of anaerobic digestion and farm ecosystem: opportunities and challenges– Frontiers in Energy Research
A Strategy to Cut Methane Emissions– The White House: President Barack Obama
