There are many ways to build a back yard biodigester, however, the principles are all the same. Sold in dozens of countries across the world and widely used in R&D and STEM Education programs, How to Build a Solar CITIES IBC Tank Biodigester is the first in "A Biogas Education Series". Book 1 is a step-by-step illustrated manual on how to build one type of biodigester using an IBC (Tote Tank) and PVC plumbing parts commonly available in the U.S. and Canada. This design is based on decades of the global service learning work of University Professor Dr. Thomas Henry Culhane, National Geographic Explorer and Founder of www.SolarCITIES.Solutions. For further guidance, visit the Facebook Group "Solar CITIES Biogas Innoventors and Practitioners" and join the conversation - and be on the lookout for more in this series!