the.com/biogas
the fart economy: rot goes in, power comes out.
means a methane-rich fuel gas produced when microbes digest organic waste without oxygen.
from humans noticed swamp gas would ignite for centuries, but it was 20th-century sanitation engineers who built anaerobic digesters to turn sewage and manure into usable fuel on purpose.
main ingredientroughly 50-70 percent methane
feedstockmanure, sewage, food scraps, crop waste
byproduct bonusleftover sludge becomes fertilizer
scale rangebackyard digesters to city power plants