This is a paper presented at the Colloquium on Environmental Scholarship 2013 hosted by Vermont Law School (11 October 2013)==External links==*European Biogas Association*American Biogas Council*Spanish Biogas Association / Asociación Española de Biogas*Biogas Video Book*Biogas Videos on YouTube*An Introduction to Biogas, University of Adelaide*Biogas from manure and waste products - Swedish case studies*Digestate treatment in anaerobic digestion plants for biogas production*The largest danish plant Lemvig Biogas – renewable energy and a sound economy*An overview of biogas purification technologies*Biogas Bonanza for Third World Development*Biogas Wiki with a lot of useful information about basic principles and documentation from projects of various sizes*Micro Biogas Production in Kenya*Indian Biogas Association*Listing of small scale domestic Biogas kits available by country
* Book: Biogas from Waste and Renewable Resources.